Why he is just a WR coach...after 30 years in the game.
..I'm not sure guiding a team to our w/l record, regardless of the circumstances that existed, is a very good resume for a HC job at very many places. He just may not have many decent offers out there. That's for him to judge of course, but there are not a lot of leaks about him and any vacancies.
My guess is he will see that the best place for him to be for at least a couple more years is at NU. Hard to see what role he'll play but they'll figure something out, maybe with a created title.