The matrix blind is ridiculous, you are completely blind for too long and it happens every time you get hit.
Edit: Butterfree still freezes you for a stupid amount of time
Edit 2: Tactical Sub-Machine-Gunner has a skilled called Sacrificed Life that is mega imbalanced. Basically when the guy who plays this race dies. The whole of his team get mega mega fast speed; its really hard to play with the speed and against it.
Ninetails ultimate doesn't work either.
I don't know if this is true but I have been told that Golem's ultimate doesnt work as well
Marine class ultimate is supposedly buggy as well. Supposedly sometimes doesnt do any damage and sometimes 1 shots people, I know this has been brought up with crypt lord but I though I would just say it again
Just found out another one, supposedly spy hunter has a really really really high evade rate
Sorry for the long list Pooky and Penguin

Perhaps if you don't have the time to do these just now maybe you should temporarily remove them from the server