I'm looking forward to the change of pace. When the whole fight is "omg spam 2", there's not a lot of room left for exciting moments. I hope cata fights have moments where burst healing is required, and those'll be the moments that get my adrenaline going. It's a lot more fun to have small periods of intense output than having to maintain your max output for 5-10 minutes.
I think I'm starting to repeat myself here, so I hope I got my point across.