Let me preface this by saying I left the game a while ago.
I don't want to retread ground that is been discussed ad-nauseum such as warrior problems. We all know the issues. WoW was incredible in its early forms, but the game was dumbed down in Lich King to almost the point of boredom.
I was primarily DPS, but, my healer friends (who also left) were adamant that healing was horridly simplistic.
I've been watching, albeit lightly, the information on how classes will change in Cataclysm. I'm pleased that they are dropping the "+x defense / +attack power" type stats and going with a more AD&D approach. Anyway, I haven't done an analysis on the deepness of the new class design.
The question: Is it worth returning to WoW after Cataclysm? Is the game deep again? Are warriors and other classes viable again?
I would appreciate feedback and insight.