I think that Ed Davis (3rd big), Valanciunas (starting C) and DeMar (starting SG) will be rotation players for a long time.
In the short term Jose, Bargs
and Bayless are probable keepers (unless upgrades can be found, which for Bargs
I'd say that it is worth keeping Kleiza at least through JV's rookie year.
Alabi has shown enough at the end of the season to be worth another look, and another year of development.
I'm on the fence about James Johnson, but I won't be after next season. It's time for him to develop some consistency.
I don't care much for anyone else. Some of them are really fun to watch, and I wish them all the best, but it doesn't make sense to get role players before the starters are secured.
This team has long term solutions to find at least at starting SF and PG, and first guard off the bench (if Bayless doesn't progress), and first wing off the bench (if JJ doesn't progress). Those are the priorities.