my old ipod doesn't do album artists, here's a JXA script to move featured artists to the track names: http://tylerball.net/articles/2015/05/fixing-album-artist-on-an-ipod-classic/

featured rename.app

var app = Application.currentApplication()
app.includeStandardAdditions = true

var iTunes = Application('iTunes')

var selection = [].slice.call(iTunes.selection())
var featured = 'ft.'
var search = prompt('Enter delimiter to search for (RegExp):', '(.*)feat\\\.(.*)')
var errors = [];

selection.forEach(function(track) {
  var artist = track.artist();
  var name = track.name();
  var result = new RegExp(search, 'gi').exec(artist);

  try {
    if (result && result.length) {
      var newName = name + ' ' + featured + ' ' + result[2].trim();
      track.artist = result[1].trim();
      track.name = newName;
    }
  } catch (e) {
    errors.push(e)
  }
});

function prompt(text, defaultAnswer) {
  var options = { defaultAnswer: defaultAnswer || '' }
  try {
    return app.displayDialog(text, options).textReturned
  } catch (e) {
    return null
  }
}

function alert(text, informationalText) {
  var options = { }
  if (informationalText) options.message = informationalText
  app.displayAlert(text, options)
}

if (errors.length) {
  errs = errors.reduce(function (p, c) { p + String(c) + '\n' }, '');
  console.log(errs);
  alert('Errors:', errs);
}