A druid is the same as a warrior. Hard to keep multi targets on you with switching often.

Well with the leak notes on the WotLK Warriors might be able to hold multi agro and be a pretty good tank, but no way of knowing until it comes out. Then again warriors don't have bubbles, heals, and rez ability. If you only have 1 person in your group that can rez and they die... long walk back to the body. Having a pally is just 1 more person that can rez if that other person pulls agro and dies.