It is quite a stretch to refer to Mark Stoops as Kirk Ferentz's "protege". Mark Stoops played DBack at Iowa 1986-88, then was a graduate assistant there 1990-91 before moving on to become the athletics director at Nordonia High School in Macedonia, Ohio.
While Stoops was an Iowa player, Ferentz was Iowa's Oline coach. Then Ferentz left to become HC at University of Maine.
So Stoops was a defensive player while Ferentz worked with Iowa's Oline. Generally, Dbacks do not learn anything from Oline coaches. Ja'Kobi Albert and Alex Afari will never be considered proteges of Zach Yenser. Ferentz had already left Iowa once Stoops became a GA there. Stoops and Ferentz have always spoken in a complimentary way about each other, which you would expect. But Stoops is a protege of Hayden Fry. He never worked under Ferentz.
Stoops apparently does not need any bones from Ferentz either. Hogan was transparent about transferring to Kentucky because of Liam Coen. Now that Coen is gone, Hogan and Scan have hit it off. It is hard to believe Hogan would have taken Ferentz's advice.
Tshiebwe is a good example of change of scenery helping an athlete. So is Levis. Tashawn Manning and Deuce Hogan may be other cases. Kentucky is a good place to play college football.