I think you may be interpreting this more negatively than it is. Ohio State has changed a lot over the years. They used a fairly pro-style offense, or at least with principles of personnel grouping and route combos, but they didn't use name-number-color (or whatever) for play calls. Imagine learning 700+ new sentences? It's a ton to memorize in a few short months.
Here's just one example of different terms used. This popped up after a simple Google search, so I can't take any credit for drawing it up. He knows the play; it's learning the terminology of the offense (which is quite complex). From all accounts, he's been in control of the offense and has been making plays. I think he'll be very good.
As for our own camp reports: it sounds about like what we'd expect. There's a learning curve. No concerns or big red flags for week one. We'll get a clearer understanding after a couple games.
I do like seeing some of the drills for receivers. I suspect they'll be a step up from last year. Will that include Harry? Hard to say -- Wilkerson may have the edge if he can show the ability to take over for Slater / Bethel -- but if Harry makes the team, then I think he leads in red zone production this year, although nowhere else.