I think you made that point well.
However, I'm not sure that there's any reason to think that you couldn't get a comparable upgrade in talent from GT to the NFL that we've seen from GS to Navy and from Navy to GT, even at A-Back. Also, our A-Backs don't have to cut-block. Some of our best perimeter blocking last year came from Dennis Andrews and Synjyn (as A-Back) drive blocking on the perimeter.
I think we also have to remember that everything is faster in the pro-game, including the backs with the ball. It may be harder to block on the perimeter, but they won't have to block as long.
Every time CPJ has taken his offense to a new level of talent, there have been experts who have used reasons similar, if not the same, as yours for why it wouldn't work at the new level. Each time, those experts were proven wrong. Now, that doesn't mean that you're wrong. However, I think it should be reason for caution in being too certain. For example, it wasn't just that better defenses caused the scheme problem, as your earlier post suggested. It was that better defenses could out play our line in 2008 and 2009, especially when JN had the bum ankles behind in the bowl games.
Also, we have to keep in mind that at the NFL level, there's more draft equity. An NFL team wouldn't have to convince someone to take some calculus. There will be high talent guys that fit the scheme who would get more playing time for an option team than for a pro-set. And almost everybody on offense would play.
Also, I think that your points 2 and 3 from your earlier post just miss the mark. With respect to wide receivers, man-coverage is tough, but the upgrade to NFL talent on both sides seems to me to be a wash. However, the scheme advantage often forces defenses to bring a DB or more into run support. That means that they become susceptible to a receiver, perhaps an A-Back coming out of the slot, being completely uncovered. With respect to the B-Back runs up the middle and the interior DL play, I'm not sure I understand your point. GT has been successful in getting the B-Back established against some of the best interior DL in the country. There's nothing about the scheme, imo, for one to think that upgrading on both OL and DL would give the advantage to the DL. Like I said, I just don't get it.