Weapons ballistics needs some work I think, I mean everything is too easy, I could kill pseudogiant or poltergeist so easy. It's even harder to kill simple dogs. I liked ballistics in vanilla shoc, I think you should bring the same to Lost Alpha, just with some tweaks like better accuracy and little bit more damage.
I really liked AK74 draw animations, I think you should make it for every rifle in the game, it's more realistic without unnecessary weapon cocking and it looks great.