New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  setCurrentModel: Ember.observer('currentRouteName', 'transition', function() {
    let transition = this.get('transition');
    if (transition) {   
    let routeName = this.get('currentRouteName');
    
    transition.then(() => { 
      let controller = Ember.getOwner(this).lookup('controller:' + routeName);
    	this.set('currentModel', controller.get('model'));
  	});
    } else {
      this.set('currentModel', this.get('model')); 
    }
  })
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('my-route');
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return 'welcome';
  },
  
  actions: {
  willTransition(transition) {
    this.set('controller.transition', transition.promise);
    
    transition.promise.finally(() => {
      this.set('controller.transition', null);
    });
  }
  }
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
  	return 'hello'; 
  }
});

routes.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
  	return 'World'; 
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{currentModel}}
<br>
{{#link-to 'index'}}index{{/link-to}}
{{#link-to 'my-route'}}my route{{/link-to}}
<br>
<br>

twiddle.json

{
  "version": "0.11.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.11.0",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.11.0",
    "ember-testing": "2.11.0"
  },
  "addons": {}
}