Evolution. Your two-back set, with both backs used as running options is easier to defend than most other sets Ohio uses. When I hear them referring to two-back sets I expect them to be sets including "White" that begin looking two-back and through motion create mismatches to Ohio's advantage. I reject the Monroe Doctrine that two "running" backs creates significant advantages in this age
While it is true that conventional 2 back sets are largely a thing of the past for that exact reason (games have become much more wide open and higher scoring, and less oriented to two-back power), as I said in a prior post, App St did some innovative things to run the ball while preserving passing options, so I hope Albin and Izzy can find a few things they can steal.
I find it ironic that we continue to have this retro argument. The argument I would have expected is not "why can't we go back to the offense of 2005-2010", but why can't the offense become more wide open, like the Bayor-BG offenses.
Myself, I think that if they can rebuild the left side of the offensive line, and I think they can, this is going to be a very good offense.