I think why Hunter class is the most popular it is the easiest class to play in pvp. Coupled with blink, cloak and a super that cover long ranges, it does rule statistically. However, I think the play itself is balanced among all classes and by no means any class is OP. A good Hunter can rack huge number of kills as much as the others. It is just bit easier and perhaps more forgiving than say a Titan especially when you are beginning in pvp. But like I said it is no guarantee if they are any good at all stages. i am sure IB can point the numerous times Hunter classes are at the bottom half of the table. Cant say about ToO as I havent had a chance to play more