I don't think he's going to transition well. I think all the hyperboles have been said. Slow to read, misses reads, quick to run, slow release, doesn't throw a tight spiral, throws a lot of softer throws despite his arm strength (he's a pure power thrower, with good arm strength but not much arm talent -- no whippiness or off platform ability), schemed a lot of simple throws by his college offense, misses a decent amount of throws.
I'm not saying he's straight up terrible. I'm knocking him down from being elite or 1st round grade. And at that point, there's a lot more competition.
I know, I know... But statistics say he gets off his first read more than 'x' player! That he stays in the pocket too much, not too little! And why do you care about a spiral? The slow release is just a myth. Those aren't soft throws; that's touch! His offense was more complex than Clemson's! Statistics say his accuracy is the best of everyone's!
I can hypothesize why stats might say something that my eyes don't agree with, but I trust my eyes first.
Btw, when I said he wasn't a great throwing talent, I meant everything encompassing throwing (not just arm talent). I get that was confusing.