Dabo went 9-4 in year 2 with a full season. Diaz went 8-3 in year 2, and the team had Michigan State, Wagner, and Temple taken off the schedule due to Covid. If he wins 2 of 3 (odds are we win all 3) that's easily a 10 win season. And in 2019, if the offense had simply managed 28 ppg (that's paltry in cfb, below 50th percentile ), that is a 10 win team too. Understand that I'm not defending Diaz, I'm just saying if we are parsing the data to come up with the justification for giving Dabo a break, then to be fair, Diaz (or any coach for that matter) should get the same treatment. Saban was garbage in his first 3 seasons. Butch went 5-6 in year 3. You generally don't know what you have in a HC until at least year 4, which makes sense because that is when the roster should consist almost entirely of the new coach's recruits (again, this is my theory for what a businessman on the BOT might be thinking)
I've tried to isolate what X factor sets the elite programs apart. Coaching? Money? Admin support? Well, we've seen the very richest programs fail (Texas). We've seen championship winning coaches go to different programs and look like garbage (Les Miles). We've seen incompetent corches win championships (Larry Coker). We've also seen programs that had virtually no admin support or resources win multiple rings (Miami). So if I had to pick one thing that Miami could do that would turn us into a title contender again, it would be this: cheat. Instead paying a HC $7 million, get a $5 million coach and spend the other $2 million on buying 3 or 4 five star recruits per class and/or pay the top end talent to stay instead of going to the NFL. Do that 3 years in a row and by year 4 you should have a roster with at least 8 5 star recruits, which should put you in the running for a national championship. The NCAA is a toothless fraud, the only thing that matters is the conference commissioner and the acc commissioner will be grinning from ear to ear if Miami wins championships again because his bank account will have some extra zeros in it.
Butch in Year 3 is a poor comparison. Miami was suffering from severe roster reductions from sanctions that has nothing to do with him.
The Dabo-Diaz comparision could do on and on.
Dabo is established, won 2 NCs vs Saban, and has a 141–34 record. He was never a coordiator except when interim HC/OC for six games to end the 2008 seaosn. He clearly is a CEO-type 'culture' coach as you call it. Clemson is a large, state school with boosters willing to literally buy success. Dabo convinced the school and boosters to retain him after his interim record of 3-3, mainly on his beating USCe, by his own admission.
I am willing to give Diaz a full Year 3. He needs to show considerable progress by the end of the season. The progress may not be '1 more win that last season'. This would be a shallow analytical argument. There are always close games that could have gone either way.
Last season's improvment was recognizing he needed to revamp the offense, hire a better staff, and getting a QB transfer to fit. Yeah, he was whipped by Clemson, but the Tigers lost one game the prior two seasons, won an undefeated NC, and lost a second. Could Miami have been better prepared, yes, but did not have the talent or experience to win that game. Period.
There were some nice games, like a 52-10 win over rival FSU, comeback at NC State, and gutty win at VT. However, all negated by the season-ending home humilation by UNC. Win that game and Miami plays in a NYE bowl game. The team looked unprepared and unmotivated, at home, playing for something. One of the worst lossed in team history. This is followed up by a bowl game against OkState and falling quickly behind 21-0. Again, the team looked unprepared, with about two weeks to prepare. N'Kosi almost lead a nice comeback.
Mostly? The worst decision Diaz made was naming himself DC. He believed he was the best available DC, with his scheme.
Are you sure he's a 'cuture' coach, and not a failing 'scheme guy' on the defensive side of the ball?