The heroes need to be reduced to one a map, if any. It's obvious that they are OP deliberately and can ruin the balance
I've no problem with them doing that, can remove them altogether if they want, but its a strange thing, I have had no trouble with any of the heroes. All of them have been dispatched quite easily. The tankbuster rifle guy dies very quick if you catch him unawares, the flamethrower guy dies very quick if you drop him from distance and the big machine gun guy dies very quickly if you chuck gas grenades at him or catch him from behind. Can honestly say I havent found them OP at all.