I LOVE this game! But I think the shotguns should be less OP, I mean, if you are going to give it tons of damage, then try to make it so that it doesn't have the accuracy of a sniper. I realize that it technically doesn't but, the scatter of the bullets, lets you aim in someones general direction and shoot and get an easy kill, because tons of those bullets are going to hit them anyway.
I really like this game - it has nice graphics and features solid game play; however, I still believe the game requires some improvement, and more balancing. The game is still a good casual game to play in your spare time, if you are looking for a good browser free fps with multiplayer, than this game is good for you; until then, I'm sticking with contract wars.