I was wondering the same. Mr. DaisyFizzi and I are planning on levelling our monks together. Him tank/dps and me heals/dps. The new quest reward rules are crappy enough (no more offspec loot until you can dual spec and switch specs to hand in) without factoring in being forced to level as a healer anyway because the dps spec can't heal dungeons at low level.

In our case, it's not too bad. He'll level as tank and I'll level as heals, even when dual spec is available I'm guessing we'll stay as we are due to the 'improved' quest reward rules. My main is also a hybrid (paladin) and I expect I'll have to rope him in to help me level there too. I know it's been said that there'll be a vendor selling gear that's not as good as the quest rewards, but healing at the beginning of the expansion is hard enough without purposefully gimping myself with gear worse than the stuff you can get from questing.

(I went off on a bit of a tangent there, sorry).

They should make the class /specific loot in such a way, that you get a choice between items that fit any spec your character can do.

If a quest wants to reward you a chest piece, for example, it could give you the choice between a leather chest with agility or one with intellect on it - using druids as example.

Some want to make a big deal of the "no choice" quest rewards, but remember this only applies to green rewards in the 86-89 range. I expect the pre-90 dungeons to be pretty easy (unlike Cata) so we won't need perfectly itemized gear. Still, I don't know WHY they don't just give us a choice of all the various spec rewards if it's green, like they do if it's blue.