Oh, that's part of it, certainly. But my point is more that Solich never quite established himself as The Guy In Charge after Osborne left, and wasn't firmly in control. The Crouch vs Newcombe situation was handled poorly from a leadership standpoint, culminating in Solich driving up to Omaha and sucking up to Crouch. Supposedly, Osborne's other assistants still sorta looked at him as the RB coach, and didn't treat him with the same respect as they did Osborne, and started to slack off on things like recruiting.
As mild-mannered as Osborne was, he didn't tolerate any BS from anyone on the team or his staff, and fundamentally I think that's one of the biggest areas where Solich was lacking.