When MOP came out I actually leveled a monk to be my new main (the only time since 2007 I've ever mained something other than a priest and I ultimately regretted it) but I had a ton of fun leveling as a full caster heirloomed mistweaver, usually doing great dps (1st or 2nd) in all of my leveling dungeons as I healed.

Alas, this awesome "spin to win" lifestyle is over and I've had to change my 3 mistweavers + mage + brewmaster group as I've picked them up again to a more conventional bm/mw/ww/ww/mage. Much bigger yawn. The important change is the mistweavers now have two stances, and the aoe spinning kick damages in one stance and heals in the other (rather than both, like before) and you can't use your HOT (which was most of my tank healing (hot x 3 meant that you could spend most of your time dpsing and ignoring the tanks health)) if you are in the dps/fistweaving stance.