Here's what I have ---
TIER 1
** Ace Bailey is someone the Jazz will try to develop into a primary offensive player all the way through his second contract, or longer, if Ace will stay in Utah, imo.
** Walter Clayton Jr. is showing he's a steady backup point guard, even as a rookie. If the Jazz can mold him and keep him cost-controlled, he's easy to keep.
** I think Filipowski could be a keeper long term. A 6'11" big with ball skills and IQ makes him a valuable complementary player. He adds value as a passer and rebounder, as well as a floor spacer, so he should be a good role player. It's not often easy to acquire this type of player.
** Kessler is establishing himself as a significant player, and he's bound to receive a big second contract. Is he the type of 5 the Jazz really want, especially when he becomes expensive? I'll say 'maybe' for now. He has some limitations, but there's too much to his game to move him unless the Jazz have something better lined up.
TIER 2 -- I do not have confidence in these young players actually staying with the team, for various reasons:
** Keyonte is gaining confidence and improving as a play initiator, but I could see the Jazz trading him rather than give him the type of extension his camp is likely to want. Or perhaps they do extend him, but with the intention to move him within a year or two thereafter. His defensive awareness and effort on that end are improving. The shooting efficiency probably remains the main question. His ability to play both on and off the ball gives him some versatility. He could go either way for me.
** Brice is proving he's a high-caliber shooter and floor spacer, but he's fairly limited when he's not scoring the ball. He's an NBA player, but he's a bit one-dimensional and I'm not sure how much a priority he's going to be long term.
** Taylor is coming off a major setback with his injury, so it's not fair to overly judge. However, he's limited enough offensively that I'm not confident he's a priority long term either. He'll have some value in the league as a long 3D wing. Perhaps that's enough for the Jazz to want to keep him, but I'm not convinced he's really a priority yet.
TIER 3 -- Are they NBA players?
** Isaiah Collier needs to shoot well enough to play big minutes going forward.
** In theory, if everything comes together for Cody with his body and his shooting, he could be a keeper in the mold of a Herb Jones, but those are big IFs. So far, there is some improvement with his body and his handle.
