First I think it's quite premature to assume that MM does not have the integrity to perform his job to the best of his ability despite his lame duck situation, and the same goes for Zimmer. Although Zimmer may not see this situation as a one year gig at all, since it's possible that Zimmer could be looking at HC of the Cowboys next year.
However I agree with you about Jerry, in that I hope he hasn't backed himself into a corner like General Custer did at the Little Big Horn. It's hard to trust a character like Jerry, but I do trust the integrity of MM and Zimmer a LOT more that that of Jerry, so I don't believe we're down for the count yet. Hang in there guys!