AI teams tend to play unfairly (pushing you into your goals, standing on your head so you cant challenge the ball in the air etc) which is a bit frustrating to be honest.
Needs improvement on the Vickers AI, half the time the zombies are stood right in front of the turrets and they wont fire on them. Plus, the hit recognition is off, 4 fully kitted out turrets all firing on zombies with hardly any hits, kinda frustrating.
The class system is totally pointless, the opposing team's difficulty only increases as you get closer to the final rather than it be based on the class. Hence why on the first match you can beat a Class 1 with a Class 4, or be beaten by a Class 4 in the final, totally pointless.....