Will be interesting to see if this works in a run dominated league, although it will make the two divisions very different. The West will have all teams that think the run is the basis for football (except NW), while the East will have Illinois, Indiana, Ohio State and Purdue, which will be some version of pass or spread based offenses going against the most run oriented teams in the league in Wisconsin and PSU (historically).
Will be very interesting if Sumlin gets it. Personally, I guess I will be surprised if he takes it, not because it could not be a good job, but I had the impression he likes the TX area. But if I remember right he is a Purdue grad and coached here and at Purdue, so he knows his way around the Midwest.
As for committing to defense, I agree completely. He will be coaching against teams with more talent than he has, at least for a while. He can't be mediocre or worse at half the game and win in this conference.