They've recruited some outstanding offensive lineman inducing a 5 star tackle and severl high 3 and 4 star players. They refused to play a talented running back last year because he did not have a full grasp of the protection schemes - which by the way they took a lot of criticism for from the internet experts who know more than the coaches
They've recruited maybe the best blocking TE in college football. So what else do you want them to do?
When Mumme was here he featured the 3 step drop and the reason is the ball is out before the rush can get to the QB. However no OC we have had here since has featured an offense with a 3 step drop, and it's rare to see that offense in todays game. So you are going to have sacks, you're going to have QB scrambles, you are going to have designed QB runs and they will end in a tackle. When they go down they can get hurt.
SJ was injured but he was still able to play the last two years almost every snap. Towles played most all of the time he was a starter. You can't hold this staff responsible for things that happened 7-10 years ago.