Recoil on rifles and pistols is too strong.
The recoil on every gun is too strong to use any of them effectively. One shot will move your aim completely off target. Automatic weapons are useless, because unless you're right next to the target, you will only ever hit the first shot before the recoil moves all subsequent shots off the target.
Combat has become much slower and more annoying because of this. When fighting grids with turrets, you spend far more time exposed because you have to take each shot so slowly, leaving more time for the turrets to shoot you, or for enemy backup to arrive. When fighting players, it's so slow, it feels like World War 1- shoot once, steady yourself, aim again, shoot second shot.