Unless there is some sort of internal political connections at UM that are in play, can not see Warde being hired at Michigan at this point in his career. While he done a good job cleaning up the APR mess, any success he has had has been from incumbent coaches or in Ollie's case already coach in waiting.
Michigan job is about football and while he has football background his results around football are spotty at best. At Buffalo, the coach he hired was just fired after a 20-36 record with one good season. He should not have let Pasqualoni come back for year three with GDL on his staff as too much influence on PP and had no choice but to let him go after the 0-4 start or would have been his head. While Diaco appears to have some upside his record is 1-6 so far.
Michigan's place as a power player is secure but can not help his cause that UCONN while seemingly was clearly next in line in re-alignment two years ago, Warde allowed himself to be out-worked by Louisville AD who claimed the spot and now we are in the pack for re-alignment with others instead of being next clear choice. While I think Warde is smart and savvy enough to move on to a P5 school as AD and get a bigger check, but even with his ties to the school he does not appear to the man for the job at this point in his career.