Long term, GP is best suited to be a DC. He was an incredible HC, but may be one of the best DCs ever. Elements like “loyalty to a fault” to struggling subordinates are greatly reduced, and he’s free to fully nerd out on scheme and technique. USC appears to be in a great spot.
I don't buy into this post-departure argument that he was a glorified DC. Quite frankly, that's insulting to the players he coached to what were at the time unimagined heights. He also took our program to unimagined heights by instilling an us-against-the-world, chip-on-our-shoulders attitude that permeated the entire program. Only an astute head coach could have built that kind of culture.
Yes, his last few years were not pretty. But when you look at how GP reached peaks, it was always after a period of re-evaluating and evolving. So to say he isn't capable of changing and evolving is nonsense, and he did that as a HEAD COACH, not as a DC.
Looking back, 2001-2002 was him learning to be a HC and building a culture. 2003 was a breakout year with him finally getting his footing and his players buying into a complicated defensive scheme with excessive, almost obsessive, game planning.
2004 was a setback, especially the 70-35 game, which led to some soul searching and a re-built 4-2-5, and 2005-2006 showed great improvement, with the 12-3 Tech game in 2006 being a watershed moment. 2007 was a minor setback, but then we got 2008-2010 -- three consecutive top 10 finishes and a Rose Bowl victory.
2011 kept the train going and we were on a good path. Then the drug bust in 2012, and despite that, we were in a lot of one-possession games our first year in the B12. 2013 was a disaster. So what happened? GP evolved again, brought in an entirely un-GP like offensive philosophy with Meachum and Cumbie, and we got 2014 and 2015, probably the two best teams, top to bottom, we've ever fielded. Injuries to Boykin and Doctson derailed 2015, but that was an incredible squad. He pieced together another top 10 in 2017 as well.
At the end, GP got stubborn, made some bad QB decisions, but most importantly, made some bad coaching personnel decisions. I'd be willing to bet he has, once again, self-evolved and could do special things with a team as a head coach.
In my opinion, I think in the era of having General Managers, he may thrive. Leave the football coaching to GP, and let the GM build the roster and handle all the NIL nonsense. As long as he doesn't default to his old cronies as assistants, I think he would be a great head coach again.