Haven't read this entire thread yet, so maybe this is covered, but if Shafer is the choice, I hope it means that Hackett is staying on. This plan works best if we're truly keeping as much continuity as possible. If not, I think we have to give a longer look to external hires. Plus I would worry we're just taking the cheap and easy route. This is a small recruiting class, so it's less risky to wait and get it right.
I hope this works out but just trying to compile names it seems like this idea fails (Spaziani, Bill Stewart, Luke Fickell, John L Smith, soon to be Kyle Flood) more than it works out (Peterson) in college football. I didn't include Chip Kelly or Jimbo or Bielema's Wiscy years because they were either named or assumed coaches in waiting with a retirement upcoming. Included Sweater Vest and Extra Marital Affair's successors because those programs were thought to left in good shape, at least on the field.