There are basically 3 things you have to look at when projecting how well (and how quickly) a player can replicate HS 3-pt shooting at the college level.
The first is that the line is a foot deeper. So if a player is really having to use all their effort to make three's at a HS level they are going to have to add strength to hit it at the college level. This is actually one area that Curtis had an advantage in. He played in a prep league that used the college 3-pt line - Travis Jorgenson had as well.
Second, where is the player's release point. Do they have good form where they release high, from on top of the forehead, or is it more of a push shot. If it is the latter than the player will likely have to modify their shot in college. At the college level where first, schools are going to study film on you, and second, have bigger more athletic players that close out faster a low release point shot is harder to get off and more likely to be blocked. This is another area where Curtis' film stood out, he had a very high, very quick release pattern.
Third, the speed of the shooting motion. Some kids hit a high percentage in HS, but have a very slow motion - Chris Bolden was sort of like this. The problem here is once again defenses are much bigger and faster in college and you are less likely to get the shot off. Alot of players have to learn how to speed up their shot to be successful in college.
I didn't get to see any shooting video on Moses in HS so I had no idea how to know if Moses would be able to be a respectable 3-pt shooter in college, and how quickly. The only video i saw showed a kid with fantastic athleticism, but didn't really show off anything else.
It sounds like from those that saw him in person or on video that at the very least issues one and two were likely to have to be improved on in college, less sure on issue 3.
If Moses can become a 30% 3-pt shooter that would be enough imo. But it is a long ways from 6% to 30%. What gives me pause is that many of his threes were wide open with no defensive pressure and they were mostly not even close to going in.
As i think i mentioned before I would develop Moses as a slashing combo forward. I don't really see him asa pure 4. He looks very uncomfortable playing around the post. He looks most comfortable when he is on the move and slashing toward the basket.
Good news is he still has plenty of time (3 yrs) to develop.