A lot in this thread is about the ABs and rightly so. Our biggest problem last year, however, and, imho, the reason we had such a time getting the O going was that we never got a BB who could consistently run through a first hit on the field long enough to make a difference. We had one - Allen - but he was never healthy long enough to make a difference. If we had had Laskey as a red-shirt senior (why, oh why, Lord, was he returning punts as a frosh?) we'd have won 9 games.
So we went with Marshall. Who was a frosh and made a frosh's mistakes. And who was no Laskey/Days when it came to running through a first hit. I've been on his case about that but you really can't expect a frosh to play like a seasoned senior and, from what I saw in the spring, he looks to have improved.
So why is this so important? Because if you want to keep the MLBs honest and in place, you have to have a BB who will get you 3 - 4 yards a carry even when the blocking goes south. We didn't have near as much trouble blocking MLBs in 2014 and the schemes worked like a charm. This was because we ran the ball up the gut effectively and one missed tackle could mean a big play. So the MLBs stayed put. (Of course, running behind Shaq made a difference too.)
Bottom line: we want our blocking schemes on the trip to work, we need a BB(s) who will carry the freight,