Freddie is a decent coach of individuals (Aristu 4th in NCAA 400m Hurdles this weekend), but he wasn't able to lead the team, and that is what it takes as a head coach in a major conference.
Michigan is a funny school to be a coach at. All the walk-ons they get are high class academic guys, and so as soon as they realize they aren't the big dogs on the team (like they were in HS), they go into cruise control in their approach to sport and focus mainly on their studies and social life.
The new Head coach needs to find a way to get walk-ons to see the value in their place on the team, and keep committed for 4 years, not just the first year. The key to scoring well at Big 10s is having lots of walk-ons become partial scholarship guys in field events, multis and mid-distance and pick at 3rd-5th place points.
So hard to recruit when out of state tuition is so high, and you only get 12.8 scholarships though. Many of the other Big 10 schools have agreements with neighboring states to allow in-state tuition rates. These other Big 10 schools such as Wisconsin, Minnesotta, Ohio State, Nebraska and Penn State also dont have a rival in state D1 public school to compete with in recruiting.