Definitely not a ridiculous notion. However, for this team I believe the answer is no.
Another post mentioned wishing we had JMM this year. I'm not sure how much (if any) better we would have been this year with JMM on the team. Maybe we wouldnt have seen as much Joel James and Jackson Simmons this year if he were on the team, but that's the only real upside I see there. However, I think its pretty obvious that the team next year will be better as a result of JMM not being on the team this year. Hicks/Brice/Kennedy all would have had some of their minutes go to JMM. JMM also would have been the "go-to" guy in the paint. I think those 3 bigs benefited a lot from the added minutes, as well as the increased roles as a result of not having JMM on the team.
With the crowd that could realistically leave this year (Brice, Marcus, Justin, JP), I don't think we're better off without any of them. Now, if we're doing a Utopia situation where I could pick people to declare for the draft, sure, I'd say we're probably a better team next year without Britt. If he's not on the team it takes the ability to leave him out on the floor for way too long while we watch his play be a contributing factor in our elimination, out of Roy's hands. It also would give Berry a chance to spread his wings a little bit more.
If I had to pick one of the four I mentioned to leave, I'd probably go with Brice. GSD pointed out that Pinson has some of the same traits as JP, but I too feel like he's not there yet, and we'd lose our best defender and best athlete if JP left. Marcus leaving would be devastating - as we'd lose our leader, best shooter/scorer, and arguably best floor general (with Berry). Justin leaving wouldn't be crippling as I think we'd patch stuff together, but it wouldn't be fun to lose that scoring ability, and the size on the wing. If Brice left - we'd probably see more Joel James which wouldnt be thrilling, but I feel like Hicks could take over well for Brice next season if needed, similar to how Brice took over for JMM this year.