OP? or just really easy to use and get good with? Thats why there are so many drakes, kratos, raidens, and kats. Of course any character is going to seem over powered when you get really good with them, and those characters are the easiest to do it with but that doesnt mean they are op. Since there are so many good kratos, raidens, drakes, and kats, everyone is going to think they are op but in reality, they are not. They are just easy to use and alot of people take advantage of that.
Are all exceptionally (cough)OP(cough) good characters. I'm not going to seem Kat or emmet Op since there hasn't been much time to acclimate to the new styles.
I play one of those top 4 almost every single match. There at other characters that need fixing too. Jak is one, sack boy is another.
This game, albeit very fun, is not even remotely balanced. To be honest, they don't have te foggiest idea on how to balance this. So instead they make it fun, wich it is