Of course they are. [ He'll be taking that power-up they just uncovered. ] And it make the competitive scene boring. When good characters get nerfed, the people that use them flock to the overpowered characters in an attempt to get one-up on the competition in tournament setting.

[ He visibly curls his nose at the thought. Not because of the idea of someone abandoning their favorite character to win a tournament, that makes sense. Just that if he wanted to win, he'd have to play the same scrub-tier character as everyone else. When he picks a favorite, it's for a reason! ]