The new additional to the list are interesting in that they seem to be establishing a pattern of focusing on some older and perhaps more NBA ready college players.
Prichard, is a player who have really like for a couple of seasons. In the 2nd round he is a really interesting pick for the Cs. I fully expect him to make it as an NBA backup PG and be able to provide a spark off the bench. At 6'2 190 he should have enough size to not be a total liability on D. If properly utilized he has a real chance to be a valuable scoring option off the bench. If drafted in the 2nd round he and Waters will make for an interesting camp battle.
Killian Tillie, if it wasn't for his injury history Tillie would be a likely top 20 pick. He is probably the best shooting 6'9+ player in this class. He is also a really high IQ player capable who is an excellent passing big. He is likely NBA ready but how long he will physically hold up in the NBA is the big red flag.
Naji Marshall, he is a play I admittedly have not researched much. On the surface it is immediately clear why DA has interest in him. His reported measurements are almost identical to Jaylen Browns, 6'7 220 with a 7'ws. These are ideal wing measurements. He has not been a good 3pt shooter in college at 28% this past season but it is encouraging that he attempted 5 per game. Watching him play he (like Smart early on) seems confident shooting despite poor %. His really calling card seems to be his high level defense and his ability to play the point forward. He is clearly a player I need to look further into and will be adding him to draft board. It is easy to see how a team like the Cs who have a track record of improving 3pt shooting % would be really interested in Marshall. A good article on him
https://www.thestepien.com/2020/01/24/case-naji-marshall/