I agree that he cheated. I was mainly objecting to your questioning of his skill. Also, I was in general criticizing the fanboy culture that builds up around famous pros. I wasn't intending to say that you specifically thought he had high character. Sorry for any misunderstanding.
I will say that while JM did cheat, I don't think that what he did was as bad as Jose superusing his skype group. Tyler was at least in a straight game and could in theory win. Jose's opponents had no chance. The whole ghosting, multi accounting thing is tricky because at one time it was widely accepted practice and now is essentially impossible to enforce against.
Also, since you can have an account on more than one merge skin, what if JM had created a random account on another skin in his name and then played Tyler? Tyler still wouldn't have known it was JM but no rules would have been broken.
I think what JM did was shady but its far from the worst thing I've ever heard of and not even close to what Jose did.