I won't deny that a new tank and healer job feel somewhat "overdue" for the new expac, but I'll also be frank and say that I don't believe the development team "fixed" the issues with tanking and healing in 4.x as they promised they would and I'm not optimistic that either new job will have unique gameplay relative to their role and that power levels will be toned down to the point where they're not just "really sturdy DPS" or "DPS with absurd group heals".