So we did a bit of heroic (old normal) last night to test out the changes and I have to say the changes to healing are kind of nice. I heal on my pally, and several of us grossly outgear the instance, but it's nice to not see health go from full to 0 in one shot. And, unlike Cata, mana regen was great. Seeing a cast time on my old instants takes some getting used to; I was clipping Light of Dawn and Word of Glory, by moving but that's just muscle memory.
All in all it feels like they did a good job this time.