The problem with Fredo as an employee in a football organization, say as a DC, is that his boss & peers don't trust him not to backstab them.
I get that and realize Mangina made many mistakes in jetland, as Pioli did in KC, but these guys are also really bright and capable, and like Belichick it could well be that they learn from their mistakes and change their ways in their next gig. Same goes for McDaniels. It could be with some of these guys that they try to replicate Belichick instead of being themselves in their first chance's, although I don't think that was Pioli's problem which was more likely that he has to tone down who he really is. Dimitroff, on the other hand, was apparently completely comfortable with just being himself and went against the advice of his former mentors (e.g...Jones Draft day trade) and went his own way with great success. I'm really happy for Dimitroff, good guy, I hope they have a good play-off run so he doesn't get crapped all over.