The issue right now is that there is not enough time to really do much. If they keep Sherrone, they will keep the majority of the team in tact. If they go with anyone other than Sherrone there will be an exodus that makes Bama's portal hopping after Saban left look like a hiccup.
You can't really make a decision strictly focused on one year, but Michigan is going to be really good again next year. Their defense will be number 1 in the country again, and they return the battery of the offense with Loveland, Edwards, Mullings and an experienced O-Line. They pick anyone but Sherrone, and they go from competing for the B1G and getting into the playoff to a full on rebuild.
The timing sucks because I really believe that if he got to pick between Michigan and Bama that Deboer would be coaching Michigan. Following Harbaugh is shitty, but following Saban is lunacy. If it was me, I would throw a line out to Lanning and make him say no and post another cute video. Maybe Jedd Fisch since he has ties.
Give Sherrone 5 years. He has to at least perform to the Shaw post-harbaugh level to stay longer, and then you pray that there isn't a drop off like Shaw had after the first 6 years.
3 Big 10 championships, and what would likely be 4 playoff appearances would get the job done.
It is a high bar for sure but, coming off a 15-0 championship, it should be.