I’ll take my best shot at a breakdown, albeit all I have seen of some of these guys is just on video.
Wesley is the only true PG, although I don’t know if he is ready to run everything.
I would consider Russell, Hardy, and Wilson all combo guards. One of them might actually be starting at PG. I really don’t know enough about Caldwell to put him anywhere but SG, he does have a little bit of height advantage over the other guards so in a 3 guard lineup he may be more of a SF.
I still say both Julien and Johnson are more natural at SF, but will play some down low out of necessity. Gueye appears to be a stretch PF and will play a similar role to Gant. I think Smith is closest thing to a C. He is 6’9” with lots of bulk and will play almost exclusively in the post.
I think those 9 are the main rotation. Lafayette, Spenkuch, Lowery and even Aucoin could factor in somewhere, but probably not on a regular basis.