With plenty of additional practice (as in 100s of made shots/day), he - or any player - will improve his accuracy. It's all about mental confidence, calmness, and muscle memory. I have worked with the late Ernie Hobbie (the original Shot Doctor), and while I don't necessarily agree with the basic form he taught, we both agreed that the simpler the motion - with the fewest muscles involved in shooting - would be the easiest to control and develop muscle memory. It seems to me that Nojel has an odd elbow tick in his shot, which would seem to be difficult to control. But I have found, in my years of coaching, that the older a kid gets, the more ingrained his shooting habits become. Granted, I have seen a rare exception, but at his age, Nojel will simply have to find a way to develop precise control over that elbow in order to develop consistency.
Of course, if he can get his game consistency - a lot different than a practice environment - to where his 3G% is serviceable in the mid- upper 30%, and - as you say - get his mid range pull-up working consistently, he can become a serious threat to score. That is, in my opinion, what made Smooge so effective at driving - not his ability to get to the rim, but his ability to pull up from 12'-15' and hit the shot consistently.
I think Nojel will get there with enough practice.
JMHOAU