yeah that's what i found too, the healer (priest) a tank (paly) are much easier to manage than before (bear tank, paly heals)
My mage is still levelling up (71 now) and i can't be bothered to do a nice macro yet, so all he does is spam frostbolts with icy veins/trinkets. He does about 800-900dps so that ok. I've met some 80s that couldn't do that much :-)
The druid and shamy pull about 2500 and 2000 dps respectively, i need to work out the moonkin rotation a bit better (re. eclipse procs) but for the most part it's ok
between replenishment, mana totem, and JoW i can't seem to use any mana on the casters at all.
The paly tank however is always oom. but i guess that's because i currently do level 71-74 instance and he doesn't get hit enough for spiritual attunement to kick in, I'll try higher instances tonight.

here are my toons:
Protection Paladin
HolyPriest
Elemental Shaman
Balance Druid
Frost Mage
Specs/glyphs are all over the place atm, i'll look into them when i'll start on heroics