At this point the only players I am reasonably confident about being on the team next year are AJ, Stanton, and Boskovic (who has allegedly said he is coming back).
We will definitely need to replace guys like Mag, Trevin, and Fouss and possibly Egor & Catchings. It would be great if we can upgrade these players in hopes of becoming an elite contender.
Keeping guys like Richie, Dallin, and Keta stay that is a great start towards next year and would be tough to replace. They will also be key contributors in helping with the team culture and winning games in November/December which can be key to seeding in March.
It would be great to keep and continue to develop players like Catchings, Crawford, Kozlowski, etc especially as BYU could be losing a ton of talent next year.
We know we are going to need more guys, we just don't where our biggest needs are going to be yet.