well, i saw a video of a game on voxlap engine a few minutes ago, and something caught my eye. when he killed an enemy, he fell in a ragdoll animation.
at 0:45 he shoots opens a door, shoots a deuce, and the deuce is a ragdoll after he shoots him.
http://www.youtube.com/watch?v=uCtgtF52nAQ
granted its not a very good ragdoll, but the ragdoll physics seem to me like it would be good in ace of spades.
would be somewhat better than the current death animations if you ask me.