You didn't cast a lot of things in Wrath, because healing is downright silly in Wrath, it's absolutely terrible what a narrow spamfest it can be. I question some of their methods to fix it, but as far as using your greater spellbook and getting the most out of it, they've succeeded there.
I can understand getting annoyed at some of the clutter, but I don't think it's quite there yet, if they keep packing it on for another expansion or two though....
But I don't think Shaman or Paladin are anything resembling cluttered, Priests and Druids arguably are, but they're also designed that way and I really enjoy having extra buttons for extra situations or alternate "rotations".
Tree of Life and Chakra could really be altered though, I like the concept of both but it does go a bit far especially since it's pretty limited to your environment.