I'm not married to this post. BUT
Now that we've established that we (myself included) were all pretty dumb for ever doubting Snyder, and it's established that the man is literally one of the best coaches in the history of college football, why not have some one who he's been grooming, who he wants to be the next coach?
We were all very gungho about having Gottleib even though he didn't have any experience.
It's definitely a risk and Sean is definitely unproven, but I bet few, if any, people on Earth have learned more football from Bill than Sean.
What's the worst that could happen? We toss him to the curb after three years, just like we would've Gottleib.
What's the best that could happen?: he's Bill reincarnate.
Seems like it's maybe a risk worth taking if you ask me.