Suggestions.

1.Add suplybox that might give xp,health, armour or etc...
2.Remove C4 from zombies(It's trivial stuff but still)
3.Make he grenade don't do damage to his owner.
4.Add ak47 upgrade, ether default or paladin
5.Add shop so players can buy some item with cash.
6.Does spawn protection exist? Add one so if later become very popular zombies couldnt get insta killed at spawn
7.Add walkguard(it would protect server from players who climb on maps)
8.Add maybe motd that allows player to check privileges(don't need to go to forum)
9.Add team manager.
10.There seems to be a bug with xp, it shows i have more xp then required, but still don't level up

For now that's all.