I very much agree with the blocking aspect, but idk about the coaches protecting arnaud. He's gonna take hits all year long and yes good blocking will minimize them, but why did we have him when the army game was over score-wise along with some second teamers and he was running the ball multiple times and some on planned QB draws?
IMO, a hit via sack because a back missed an assignment would be far greater than about any hit on a QB draw (unless we're talking in the open field). So I don't by the protecting AA but I do most certainly buy one of the reasons Bo is not in there being related to blocking.