They started the FB at OG. It's not like they didn't have guys ahead of them him on the roster, it's that those players weren't available through injury or waiver denial, not one, not two, but four guys.
Once Dakota came back protection improved and they were able to actually run the ball against ND. What does the offense look like with Davis at OG and Elmore at FB from game one?
People keeping missing the fact that they had very limited, if any, contact in practice. They slowed played it in games, not because they wanted to, but they didn't have the bodies to play tempo.
They were down to 7 available linemen, and they included the FB, two true freshmen, and red shirt freshman that wasn't close to ready to go at tackle. They didn't start playing Ilaoa in the offense until the second half of the season, just spotting him.
Instead of 6 actual OL available, there will any where from 16-18 OL in august next year (depends on what Patrick Davis decides to do and what Q Whites true availability is). They could bring in a transfer or two. That fact by itself makes this a MUCH different team.