A couple of my observations:
1) There is no such thing as overpowered characters, only underpowered opposition. Superman is ludicrously powerful, but well placed in handling planetary-scale threats. Spiderman is modestly powerful, well placed in neighborhood watch, can pinch-hit usefully at city level, and has no business in much larger conflicts.
2) It can be loads of fun to watch two mismatched characters who can't get rid of each other. Dvorak is considerably more powerful than Qwerty in almost every way ... but Qwerty is like the annoying little sister who tattles every time her older sister sneaks out the window and won't stop following her. That's never going to stop being funny.