I just want to give some input to Fursphere's comment,

I play a warrior/pal (healer)/3x hunter.

Warriors are totally fine for aoe agro up through SM/uldaman (all I've done so far). Improved thunder clap combined with the low amount of threat generation from hunters and the paladin is solid. When things really do go wrong, the hunters can FD, the pets can take a beating, and the paladin can bubble out of agro.

I have not used the pets to offtank much because it would take too much work to target the mobs to offtank them with, and I won't argue that warriors are micro-intensive. However, the beauty of the group is that hunters and paladins are *not* micro-intensive and so you can pull off using the warrior as your main effectively.

Multishots cooldown prevents it from being an effective AOE tool. (in my experience up through lvl 40 at least, maybe I'm missing something that comes later on?)