Lincoln Riley is a genius at turning out great QBs. If he had Tyler Buchner, he would do the same with him. There would be none of the usual liitany of caveats: he only played one season in high school; he's had a problem with mechanics in the past; he was injured before; and we don't want to throw him to the wolves too soon.
The huge difference is coaching: Lincoln Riley is a QB whisperer; Brian Kelly is a QB Terminator.