If BYU was smart they would already be planning Bronco's exit which should happen by season's end (but probably won't). Football-wise It doesn't matter what happens from here on out the rest of this season. If things continue this way, BYU will start next season losing their first 4 games and most likely do it in ugly fashion and Bronco will be gone by season end anyway. The football team needs new leadership and direction and you need to make changes right away. Give Bronco a big thank you, a nice going away check and then kick his butt out the door so he can go be a mission president somewhere.
But like I said, I don't think it will happen. BYU has not shown an ability to be proactive in this regard. BYU will wait until the program is in much worse shape to do something.