I don't think he would have brought in Gattis (and Gattis would have came here) if he wasn't serious about changing. Jim's a stubborn guy, but he does listen, and there has been a cabal of analysts pushing him in this direction for a while now (my guy on the staff is one of them).
I still think they should find a role for Mason like how OU uses their FB/HB but there is no reason why we shouldn't be playing out of mostly 11 personnel next season with the talent on this roster. Michigan has three NFL WR's, a RB who can run routes and catch, and a QB who excelled at running RPO's at Ole Miss, the Joe Moorhead/PSU offense should be a perfect fit for their personnel.