2 main things imo:
1. Inaccurate QB
2. Inconsistent OL.
Coming into this game, Rosier was only completing 56% of his passes on the season, that's basically Average to below average.
We've been winning games based on Defense & getting big chunk plays in crunch time. Rosier has been Hot/Cold all year, that's who he is as a QB, we haven't needed him to be a Heisman winner for us, just protect the ball, make plays with his legs & hit on some of the Deep balls.
He's done that sometimes this season & other times he couldn't hit a parked car from the driveway with a tennis ball.
He's been a solid QB for us, today we needed him just give us 3 scores & he couldn't get it done. It happens, but I still believe in him & hope he heats up vs Clemson.
As for the OL, our run game has struggled for the last 2 years. Everybody said it was Walton, but even Homer has mostly been contained for the majority of the games we've played until he would usually breakout late in the 3rd & 4th quarters.
Our Offense is predicated on 2 things, Running the ball & getting TD's off the Deep passing game. When the run game isn't going our best hope is that Rosier heats up & drops dimes, when he doesn't we have to hope the Defense can just hold off opposing Offenses long enough for our own to get going.
I do think there are things we could be doing to be more creative with play calling & getting the ball to our playmakers, but ultimately I believe our Offensive struggles are mainly on a limited QB & an inconsistent OL.