more speculation:
Trying to make sense of a lot of what I've seen with MM this year and I think that $100,000 fine and admission of guilt really, really hurt him. For most of us, I think, payment of a $100,000 penalty, by a man who just pocketed $12 million, wasn't a big deal. I don't recall MM's statements at the time, but even if he stayed quiet (which he may have been advised to do), when you pay a 6-figure penalty, you are making a public admission. I don't recall the terminology, but "Calvinistic" comes to mind; I think MM is deeply religious and his payment of the penalty is akin to admitting a sin.
I don't think MM did much at all wrong. I don't believe MM thinks he did much wrong. CU decided what would look best and MM went along.
I think MM feels he's been betrayed and shamed and wants to move along. I don't particularly like him, but I don't really blame him either.