compliance suggestions ES7 vs ES6

gistfile1.txt

curl -X POST -f --insecure -H "api-token: $(get_admin_token)"  "https://localhost/api/v0/compliance/reporting/suggestions" -d '{"type": "control", "text": "Profile 2 - Control 1", "size": 3}' | jq
ES7 request query
{
   "_source":false,
   "aggregations":{
      "profiles":{
         "aggregations":{
            "controls_filter":{
               "aggregations":{
                  "controls":{
                     "aggregations":{
                        "titles":{
                           "aggregations":{
                              "ids":{
                                 "terms":{
                                    "field":"profiles.controls.id",
                                    "order":[
                                       {
                                          "_count":"desc"
                                       }
                                    ],
                                    "size":3
                                 }
                              }
                           },
                           "terms":{
                              "field":"profiles.controls.title",
                              "order":[
                                 {
                                    "_count":"desc"
                                 }
                              ],
                              "size":3
                           }
                        }
                     },
                     "filter":{
                        "bool":{
                           "must":{
                              "match":{
                                 "profiles.controls.title.engram":{
                                    "operator":"or",
                                    "query":"Profile 2 - Control 1"
                                 }
                              }
                           },
                           "should":[
                              {
                                 "match":{
                                    "profiles.controls.title.engram":{
                                       "operator":"and",
                                       "query":"Profile 2 - Control 1"
                                    }
                                 }
                              },
                              {
                                 "term":{
                                    "profiles.controls.title":{
                                       "boost":100,
                                       "value":"Profile 2 - Control 1"
                                    }
                                 }
                              },
                              {
                                 "prefix":{
                                    "profiles.controls.title":{
                                       "boost":100,
                                       "value":"Profile 2 - Control 1"
                                    }
                                 }
                              }
                           ]
                        }
                     }
                  }
               },
               "nested":{
                  "path":"profiles.controls"
               }
            }
         },
         "nested":{
            "path":"profiles"
         }
      }
   },
   "query":{
      "bool":{
         "must":{
            "terms":{
               "daily_latest":[
                  true
               ]
            }
         }
      }
   },
   "size":0
}

response
{
  "took": 54,
  "timed_out": false,
  "_shards": {
    "total": 30,
    "successful": 30,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 11,
      "relation": "eq"
    },
    "max_score": null,
    "hits": []
  },
  "aggregations": {
    "profiles": {
      "doc_count": 22,
      "controls_filter": {
        "doc_count": 171,
        "controls": {
          "doc_count": 57,
          "titles": {
            "doc_count_error_upper_bound": 0,
            "sum_other_doc_count": 36,
            "buckets": [
              {
                "key": "Check Apache config file owner, group and permissions.",
                "doc_count": 7,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "apache-05",
                      "doc_count": 7
                    }
                  ]
                }
              },
              {
                "key": "Check Apache config folder owner, group and permissions.",
                "doc_count": 7,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "apache-04",
                      "doc_count": 7
                    }
                  ]
                }
              },
              {
                "key": "Disable Apache’s follows Symbolic Links for directories in alias.conf",
                "doc_count": 7,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "apache-11",
                      "doc_count": 7
                    }
                  ]
                }
              }
            ]
          }
        }
      }
    }
  }
}

ES6 request query
The only difference I see is that the size is set to 10 and not 3. 
{
   "_source":false,
   "aggregations":{
      "profiles":{
         "aggregations":{
            "controls_filter":{
               "aggregations":{
                  "controls":{
                     "aggregations":{
                        "titles":{
                           "aggregations":{
                              "ids":{
                                 "terms":{
                                    "field":"profiles.controls.id",
                                    "order":[
                                       {
                                          "_count":"desc"
                                       }
                                    ],
                                    "size":10
                                 }
                              }
                           },
                           "terms":{
                              "field":"profiles.controls.title",
                              "order":[
                                 {
                                    "_count":"desc"
                                 }
                              ],
                              "size":10
                           }
                        }
                     },
                     "filter":{
                        "bool":{
                           "must":{
                              "match":{
                                 "profiles.controls.title.engram":{
                                    "operator":"or",
                                    "query":"Profile 2 - Control 1"
                                 }
                              }
                           },
                           "should":[
                              {
                                 "match":{
                                    "profiles.controls.title.engram":{
                                       "operator":"and",
                                       "query":"Profile 2 - Control 1"
                                    }
                                 }
                              },
                              {
                                 "term":{
                                    "profiles.controls.title":{
                                       "boost":100,
                                       "value":"Profile 2 - Control 1"
                                    }
                                 }
                              },
                              {
                                 "prefix":{
                                    "profiles.controls.title":{
                                       "boost":100,
                                       "value":"Profile 2 - Control 1"
                                    }
                                 }
                              }
                           ]
                        }
                     }
                  }
               },
               "nested":{
                  "path":"profiles.controls"
               }
            }
         },
         "nested":{
            "path":"profiles"
         }
      }
   },
   "query":{
      "bool":{
         "must":[
            {
               "type":{
                  "value":"_doc"
               }
            },
            {
               "terms":{
                  "daily_latest":[
                     true
                  ]
               }
            }
         ]
      }
   },
   "size":0
}

response
{
  "took": 120,
  "timed_out": false,
  "_shards": {
    "total": 30,
    "successful": 30,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 11,
    "max_score": 0,
    "hits": []
  },
  "aggregations": {
    "profiles": {
      "doc_count": 22,
      "controls_filter": {
        "doc_count": 171,
        "controls": {
          "doc_count": 7,
          "titles": {
            "doc_count_error_upper_bound": 0,
            "sum_other_doc_count": 0,
            "buckets": [
              {
                "key": "Profile 2 - Control 1",
                "doc_count": 2,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "pro2-con1",
                      "doc_count": 2
                    }
                  ]
                }
              },
              {
                "key": "Profile 1 - Control 1",
                "doc_count": 1,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "pro1-con1",
                      "doc_count": 1
                    }
                  ]
                }
              },
              {
                "key": "Profile 1 - Control 2",
                "doc_count": 1,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "pro1-con2",
                      "doc_count": 1
                    }
                  ]
                }
              },
              {
                "key": "Profile 1 - Control 3",
                "doc_count": 1,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "pro1-con3",
                      "doc_count": 1
                    }
                  ]
                }
              },
              {
                "key": "Profile 1 - Control 4",
                "doc_count": 1,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "pro1-con4",
                      "doc_count": 1
                    }
                  ]
                }
              },
              {
                "key": "Profile 1 - Control 5",
                "doc_count": 1,
                "ids": {
                  "doc_count_error_upper_bound": 0,
                  "sum_other_doc_count": 0,
                  "buckets": [
                    {
                      "key": "pro1-con5",
                      "doc_count": 1
                    }
                  ]
                }
              }
            ]
          }
        }
      }
    }
  }
}