Using purely analytics (and the 247 rankings), Rhoads' average recruiting class was #63 in the country, Campbell's is 54. So yes, it has improved. But at 54, particularly when several of the top-rated recruits are guys that didn't do anything at Iowa State, you need to be solid to great at the other aspects. Development, in-game coaching, special teams, discipline, etc. I think there's some evidence and maybe growing, that CMC can develop players. But the play calling, in game coaching, special teams, etc. have been far below average. And despite losing 9 of our last 10 P5 games (and 15 of our last 19), he doesn't seem to want to change anything.
I'm sort of a junkie of sports radio and podcasts. I recently heard an interview with Marcus Freeman, Notre Dame's coach. He was reflecting on changes he had to make to his game plans following an 0-2 start last year. He said that all coaches like to use the phrase "trust the process" and that it works for new coaches as it allows for perspective and giving new coaches some leash. But he added that he believes that there comes a point when that no longer works and it's time to "fix the process". They're 12-2 since.