I'm still doing the mixed group of tankadin, ret, enh, resto +UH DK. No issues for me yet. 2 bind elementals, 2 hexes, 1 repentance covers pretty much all my CC needs. Plus AOE stuns on holy wrath for elementals & dragonkin. Interrupts and resists out the wazoo, WoG, Healing Rains, Healing Steam and Holy Radiance adds up to some nice healing.

A lot of classes got a lot of nice new tools to play with, so I think just about anything can be made to work together.