Suggestions:
-Make anti-aircraft gun be insta-hit
-Remove names
-Edit sniper to be insta-hit but only do 1/5 damage for shots not in the head
Not really sure about the sniper one :/
EDIT: This is just something I think would be interesting to try:
Weapon system where you can have one primary, one secondary, and then the other crap or a class based system :o