The problem I have with hunters is that they're very hard to counter. A titan's bubble stops them shooting at you, a warlocks nova bomb takes time to throw, making you vulnerable. The golden gun simply gives you three kills if you can point it in the right direction and the arc blade increases speed and melee damage. Both of these abilities can be activated in cover, where as the warlock and titan offensive abilities require you to be in the open to score a hit. Hunters arn't necessarily OP these two factors just make their supers very hard to counter and make them feel OP in a fight.