It's impossible to split up credit so I won't try. If you say the credit should go to players who took matters into their own hands, do you then want to give Diaz credit for recruiting players that are the type that are willing to take matters into their own hands? Isn't recruiting the right type of players part of a HCs job?
Awhile back I read an interview with Nick Saban where he talked about his recruiting philosophy. Sure, he can pretty much get his pick of all the 5 stars, but he was asked specifically what traits he looks for. He said the #1 trait is off the charts competitiveness. He wants players that get angry at the thought of losing because it is hard to convince a teenager to take a game against Valdosta St seriously, and then they play down to opponents and lose.
So if one of the all time greats says that it his philosophy for building a successful football team and then Miami has players that show that same competitiveness, are you willing to assert that although Diaz is a terrible game day coach, he is also following Sabans core principle of recruiting and the players innate competitiveness turned the season around? What percentage of the team success do you apportion for that?
You can't have it both ways and give all credit to players and zero to the coaches that recruited those players. Our stud QB was a low 4 star out of Connecticut and recruited by Diaz's first OC. All of Richts (a supposed QB guru) QBs were busts, yet under Diaz we have the best QB stable in a decade. Since a top QB is key to cfb success (just ask Dabo), does Diaz get a standing ovation for hiring OCs with an eye for QBs, and now having 3 excellent QBs on the roster? The point is you can't fairly apportion success percentage between players and the staff. If you want to do that for winning, then you need to do that for losing. Should we go back to 2019 and then say the players were 90% responsible for losing (e.g. Jarren Williams, a Richt recruit, being a pothead who didnt take the QB job seriously and then a team mostly made of Richt recruits that quit on Diaz) and the staff was 10% responsible? I'd rather not go down that road so any success (and failure) to this point is shared equally by players and staff.
If a new HC comes in and wins a national championship with these players, then now you have some proof that Diaz was holding them back. But what if Diaz finishes 8-4 and wins the coastal and Cristobal with these same players goes 6-6? Are you going to retroactively say Diaz managed to get more out of the players than Cristobal so he's a better coach?