Something that would enhance infantry combat immensly would be to introduce limping when shot badly in leg(s). It would be awesome to see an enemy start limping in the distance, and it would be even scarier to be shot in the leg on self as you would move slower into cover to get help. It could be slightly randomized so that not every AI start limping around as that could look rather silly.
With BIS mocap studio and coding skills im sure they can do it, and it would heighten infantry combat immersion im sure. We've seen BIS add new animations since initial release so maybe one last new animation set wouldnt be too far fetched? It would make combat feel a bit more organic. :)