I think Butch bungled the entire offseason. Team 119 overachieved to have been so close to 12-0. Butch and the team by extension thought they had arrived and that all he needed to do to win the East and 10+ games in 2017 was preserve the health of his returning studs and then just run through everyone on the schedule.
S&C decisions were an overcorrection on his part, IMO, due to the injuries sustained in fall camp last year. No one really got hurt in fall camp this year outside of Hall, but the team wasn't prepared for live contact whatsoever. They got pushed around by App State. Ball security issues are also indicative of a lack of contact. Once the season begins, your chance of ironing out those issues is mostly gone, because most coaches don't do full contact drills during the season itself. Too risky and players are already beat up.
Lack of full contact practices/scrimmages also perhaps contributed to the uncharacteristic penalties and overall lack of "fight" that we saw in the team until their backs were absolutely against the wall.
I believe Fulmer said something on the pre-game show before the Missouri game about how difficult it is to correct major issues with a team mid-season. You establish your identity in fall camp and hope you got it right, because by the time the season starts, it's mostly too late to change it. At that point you're licking your wounds, holding guys out of practice all the time, and gameplanning for opponents.