The new version of the bundle has de-cluttered very significantly the admin controller. Everything works the same as before and you don't have to make any change, but now we use the Symfony features as they are supposed to be used (from types, form extensions, form themes, etc.) Exceptions have been greatly simplified as well: we now have less code and less files, but the same behavior remains.
New features
[a0494d9] Added the "Add another item" action for all collections (@thomasbeaujean)
[db68bde] Added a new EasyAdmin form type to de-clutter the admin controller (@ogizanagi)
[7bf9850] Added a new EasyAdmin form extension & form themes to de-clutter the templates (@ogizanagi)
[65820cd] Deprecated the 'admin' route in favor of the new 'easyadmin' route (@javiereguiluz)
[8d46ad5] Improved the way associations are displayed (@javiereguiluz)
[380a4f1] Simplified the handling of dynamic methods in the admin controller (@javiereguiluz)
[02e6bab] Defined new events and methods related to Doctrine QueryBuilder manipulation (@tiraeth)
Bug fixes
[753d70a] Set required to false by default for checkboxes (@ogizanagi)
[22674b7] Empty form fields now display the right height (@javiereguiluz)
[b6683d5] Optimized pager count to avoid issues with large databases (@COil)
Misc.
[7f13f79] Added php-cs-fixer task to travis (@ogizanagi)
[8850e68] Added Turkish translation (@ismailbaskin)
[c429fca] Send the right HTTP status code for each exception (@javiereguiluz)
[e84d1bf] Simplified the configuration of the exceptions (@javiereguiluz)