Tank:
Gear wise your pally looks fine for starting heroics. What is your tanking rotation?

Healer:
And which spells do you heal with? Mana problems? I would really consider going Disc with the priest, mana efficiency is great.

Warlocks:
Again, Destruction might give you much better dps as a boxer. Fights on heroic are relatively short, I don't think affliction will even have time to get dots on during trash fights and when you gear up a bit bosses drop pretty fast as well. My affliction lock was struggling and dot rotation macros just didn't seem to cut it, also 1.2 - 1.3K dps and when I switched to Destro it jumped to 1.8 - 2K dps.

PS: Might want to try Halls of Lightning, the first 2 bosses are pretty easy, not too much funny stuff and the 3rd boss is now much easier after the nerf. Last boss might be doable as well with CoH.