That's pretty much my problem. I don't think MK is unbeatable or anything like that, and the game's only been out for like, half a year, so.... there's still the possibility that MK won't be what I see him becoming. At the same time, I think if MK had never been included in Brawl it would have been a much, much, much better game. I'm fairly convinced that one of the reasons that Snake is on Ankoku's "God" level is the fact that he's one of the only characters, if not the only, that might actually have an advantage on MK.
If you take MK out of the picture, suddenly you open up the game to a lot more characters, and make the playing field a lot more even. Naturally skill is still the most important aspect of Brawl - Chu will still be winning tournaments because he's f***ing Chu. That doesn't mean that MK isn't bad for the game, it just means that he's not totally degenerate, like Akuma.