Despite being upset at NCAAs, I would argue that Myles Martin was clearly a better wrestler as a senior than as a freshman or sophomore.
I also think that many elite collegiate wrestlers tend to peak near the end of their redshirt sophomore year and are at a similar level or even slightly below (due to scouting, injuries and HEW) their last two years. I think you can find these examples at every school, heck I think soph Ed Ruth doesn't lose to freshman Gabe Dean like senior Ed Ruth did.
That said I agree with some of your points about tOSU, but imo it's a bit too far to say they can't coach. But that is semantics, thanks for going into more detail.