Well excuse me while I go back to enjoying what is by far the most fun sidequest in any FF game ever.

In all seriousness though, especially if you haven't used CC before it's best to separate it from the main game entirely. The Fiend Arena is still there and if you don't like creating creatures, you can still go through that arena with YRP - the battles there are really fun and challenging at pretty much any stage in the game. And if you don't like using creatures in the main game you can still use them in the Arena. Mix and match with YRP so you actually have something to do besides regulate stars.

To me it only expands on the already amazing combat system. CC-ing can be a lot of fun.