The most important quality, by far, in an OC imo is in-game adjustments and the ability to read a defense on game-day and make split second adjustments and play calls.
That is the quality most associated with consistently producing elite offensives
Every single person can sit for 50+ hours and gameplan. You can gameplan all you want (and it’s important), but how are you gonna respond when a defense hits you with a brand new look or your gameplan is just not working.
For example, Coley’s first 15-20 plays are masterful.
Once the defense adjusts though, he can’t counter-adjust. He can’t quickly process what the defense is throwing at him and call plays that exploit the opposing defense. He’s a step behind the rest of the game.
CFB’s best offensive coordinators - Mullen, Kiffin, the Riley brothers, etc. - are quick processors with an excellent feel for the game. That’s why they almost always produce high-powered, explosive offenses regardless of talent level and injury luck.
Coley can’t do it. It’s part of the reason Joe Brady failed at Carolina. People say he was consistently late in getting calls in and failed to properly counter opposing defense’s adjustments. That’s not a talent issue, that’s a coaching issue.