in a overall text, I will make a small version of everything said in that thread:
priests have by far the worst mana regeneration in game, even shadow with dispersions and evangelisms and hymns are going oom very very quickly while the utility they give in both PvP and PvE schenario is by a huge distance worse than what any other class in the game gives.
Priest healers are at this moment unplayable, if you have beta and you play priest you will understand what I say, compared to other healers right now we go oom the faster, our healing output is weaker than any other healer in game, and our mana is very very poor while the only good side of the priest (which is the ability to be a DPSer in some cases rather than just a healer) is destroyed by the fact priests in beta have the worst surverability in game as well as worst mobility which makes going offensive even with the best of the peels, undoable.
this all is being said while playing arena with very high level players, I can assure you the path we are going into cataclysm, if nothing new is changed, is the darkest possible.
thank you for reading, lets now discuss this matter in the best way possible.