He has been trying to run that same run-heavy West Coast Offense that Harbaugh still runs, but doesn't have the know-how, or the athletes to make it happen in this day and age, since his recruiting isn't anywhere nearly as what Harbaugh was getting at Stanford, much less Michigan.
2018 was the last time he had any real measure of success with it, and only because the Pac 12 was pretty weak.
My opinion of him is that he wouldn't know how to be flexible with a new team designed for a K-gun / spread hybrid attack. If anything, I'd predict that trying to force the WCO into this team would be similar to 2002, where Willingham and Diedrick tried to turn a power option running team into one that ran that simplified finesse West Coast Offense that was all too predictable.