Lotta revisionist history in this thread. Arch was either woefully unprepared to take over the starting spot at QB after two seasons on campus or he had a serious mental block going on when attempting to complete straight forward passes to wide open receivers during the first half of the season. Yes, the OL was awful and the running game was non existent but Arch’s inability to confidently quarterback the offense was apparent to anyone watching those games. We know because of the second half of the season that it wasn’t just an inability to play the position. He grew into the role mentally and physically. It was basically like watching a true freshman QB evolving as a season goes on instead of a third year sophomore.
To the point of the OPs question, if history is any indication go back to the 2010 offseason where Mack attempted to model his spread offense into more of the power running ball control offense that Muschamp wanted to complement his D with. We all know how that went, by halftime of the Rice opener. (A fascinating game to rewatch btw.)
Sark seems perfectly capable of building via the portal and running an offense that will provide complimentary football to Muschamps side of the ball so I’d imagine things go better this time around.