The ultra athletic DTs don't exactly grow on trees up here in the midwest.
So you're saying we're at a disadvantage to Southern teams? Don't let ESPN / Pat Forde hear you say that, their suspicions will be confirmed. OSU has to do what they have to do to compete nationally. (And I think they are trying to do that.)
However, like much of your post, I think you're being a bit extreme. I'd say Wells, Williams, Mobley, Simon & especially Fellows fit the bill for very athletic bigs. Goebel as well, but not as quick as those guys.
That's a bit hyperbolic. I thought they did a pretty solid job outside at OT, including against a major talent in Jackson. The interior was where OSU struggled.
I would just say that what happened in the last two title games was extreme. I have stopped trying to find bright spots in either of those games. They are what they are IMO. We got whipped badly in lots of areas. I was there, felt and watched the pain.
Then again, facing two top-5 DT talents will do that to you... including one whose suspension was lifted just in time for the postseason.