I'm unsure what's up with this argument but I think you're asking: is Halzle not as good as Kelly as an OC?
Josh Heupel, like Ryan Day, is a former OC and QB so they're both extremely involved in developing the game plan for their teams. While they both have OCs, it's very safe to say they have the final say in almost everything on the offensive side of the game.
At this late date in the season, Halzle's role at UT and Kelly's role at tOSU are pretty set. They've both coached (in whatever their particular OC role is, which is not exactly defined for us as outsiders) all season. Lots of us have bitched about UT's "vanilla" calls and lots of tOSU fans have bitched about their running game calls, particularly vs Michigan.
You seem to see Chip Kelly as more of a "presence" at Ohio State than Halzle is at UT and I suppose that's related to his NFL experience for you? You want Halzle to have a higher profile? You want him to plot our offensive strategy instead of Heupel?
I think Kelly is there to augment Day but Day is the guy making the big decisions. It's the same at UT...... Halzle is definitely second in command when it comes to our offensive strategy.