Yes, DeBoer recommended Sheridan, but the idea that it's only in hindsight that people are saying the Sheridan promotion (as OC) was a bad move is not accurate. The decision was widely questioned at the time, particularly since IU was coming off an 8-5 season, a Gator Bowl appearance, and the HC himself acknowledged that there was a great deal of outside interest in the job.
A 2-10 season, after a preseason national ranking, obviously doesn't generate the same level of interest. Bell, right now, might be as good as it gets.
I don't know much about Bell other than that he was successful at Arkansas State, not so much at Maryland and FSU, and a disaster at UMass, but I will say this. He must be a pretty good salesman to quickly land a high-paying P5 gig after the debacle in Amherst. Hopefully that salesmanship will translate to effective recruiting. And if he can do something - - anything - - to improve our atrocious offensive line play, we should be competitive again.