If you're happy with what you have there's no real reason to switch back. Personally I use Flash 8 and CS6. No need to upgrade, but if you already have the upgrade then...
All versions of Flash probably have a certain set of bugs too, but if CC really is worse then yeah I've never had huge trouble with the earlier ones. Just the occasional quirk.
yeLLoM156
Animate cc has more option and more updated but, I literally don't really stayed in CS6 that long bc there's no "Zoom size with stage" which you can have same pen pressure when you zoom in. I don't know how to answer this. It's up to you I guess! they both work the same (for me) sorry If It doesn't help
LandLineNG
But animate cc is very buggy