I do think it can be very easy to overstate mana problems too however, i'd add. For some people, not being 'mana neutral' is equal to a bad mana situation; that is, finishing a fight with nearly the same amount of mana as you began (a good example being Cata druids who have pretty much had mana burn given their insane regen). Mistweaver monks for example have a pretty unideal mana situation given the need for Chi to build up Mana tea charges, and the relatively low proc chance of Chi with Soothing Mists (20%), and then there is the 100% chance with Surging Mists which has an unfortunately rather massive mana cost. I'm sure they will tweak numbers and so on, but from what i've seen in the beta, mana is not in such a crippling state at the minute for healers; not that there can't be improvements.