I've always thought this game could do with a differentiation between severely injured/incapacitated, and flat out dead.
Coming with this differentiation you could add several features to accommodate the differentiation, A medical/body drag system for moving injured and quickly bringing back teammates quickly without people just miraculously coming from nowhere.
That being said, I can see the technical limitations, as ragdolls are client side at the moment, but the idea stands I suppose.
Differentiation of death and injury seems to be something that has been done, and should be done with this game, as it's already implemented in the game in the form of tactical rolls a