I think the key early in the season will be how they deal with d-line stunts. Last year that seemed to be a week point early in the season and was one of the contributing factors to the loss against UNC.
Offensive lines can change a lot over the course of a few weeks and definitely over a few months, without changing the players
I've been a part of a couple football teams that got stomped on the LoS in August in scrimmages and then beat the same opponent into a pulp in October.