I think the best bet on that would be to wait and see if its in the expansion. I have heard that there will be a prone position but i'm not sure about that.
I'd like to see you slow down or limp when you get shot in the leg or so. I guess we will probably see that in the future, but god damn I want it now IN MOH
I don't know if any of you have played Soldier Of Fortune or not, But they have a setting that when you get wounded you actually slow down and limp and other realistic stuff. And as you pick up med packs you heal as your health bar goes up. Something to ponder.