As I stated in another thread, Horton's only shot at landing the full-time job means all of the following: trouble finding a coach in a timely matter, Gophers pulling some upsets, players rallying around him, fans supporting him (aka play Gray), and luck.
He'll either lame-duck the end of the year, or he'll go all-in and try something new. I can't see a change in the playbook, but I can see modifications. Gray at QB, wildcat plays, less forcing of the run. If ANYONE has paid attention to college football, or even the Big Ten, they have seen Pryor, Robinson, NU's new kid -- all running when the pass isn't there. Gray can, and should be doing this.