I don't know if this sounds too much CoD' ish but I would like the feature to be able to pick up stuff from fallen enemies and allies, for example you run out of ammo and you just found a fallen allie you could be able to pick his weapon if diferent or get ammo, also, you could also get blocks if you have less than 50.
I don't know if this was already discussed but I think it's a good idea.
Feel free to express your opinion :D