At this point, I think you need a director-of-football like Alonzo Highsmith, with full autonomy to build a football program piece by piece—outside of just saying to throw money at it.
Listened to him on the Orange Bowl Boys podcast and he would at least come to Miami with a vision. a game plan and an authentic backstory as to what worked before—which when combined with a solid-enough coach—could turn 7-6 into a consistent 9-3, which can be built off of (10-3 after winning bowl games, or 10-4 if getting to ACC title games and losing.)
Do that much and you'll see an uptick in recruiting and the type of players Miami fields across the board and things get incrementally better.
Right now UM has a president who is clueless, a low-rent AD and a board of trustees in constant conflict. Everyone is asleep at the wheel, while Manny bleeds the program out and over-celebrates one-point wins, while making sad excuses for three-point losses.