It's not broken. As I've said multiple times, sunbreaker literally only has a good super and nothing else. Without the super, the sunbreaker has the weakest abilities of the other classes. That is how it's balanced, best super + mediocre abilities. Also the only way a blade dancers is easily countered with shotgun punch is when they don't know how to properly play their class. As I said before, their mobility compensates for the lower defense.