As stated earlier, it's way too early to discuss the OPness of a class. And then again, I can imagine that some classes might have an advantage in a pure 1v1 face-off, but in a team match I'm sure that every class will have it's advantages, disadvantages, some might be more balanced and everyone will have it's own purpose and be usefull in it's own way. (For exemple, if a class could get enemy position intel that will give an advantage and even the possibility for less skilled players to get kills on stronger ones, which also makes him important, even when he isn't the one getting the kills). On top of that, this game is still a FPS and requires a players own skills.