I don't see any way out other than rebuilding again because Robert/Moncada only became solid players and not stars, Giolito/Lynn/Anderson peaked early and aren't the same and Cease peaked when Giolito/Lynn/Anderson already fell off.
Also Eloy was injured and has otherwise disappointed because he can't hit the ball in the air.
Vaughn either is still figuring it out or it might be too late for him.
Kopech's secondary stuff might not be good enough to start.
Robert is a solid piece and Vaughn might be, but they really don't have anyone long-term besides them and we all know Cease is getting paid by someone other than the Sox.
There's really no reason to keep Vaughn and Robert around to build around.
Nobody is arguing that Hahn et al should get to do it, but they’re losing way too many players to FA to realistically compete anymore. This year was pretty much their last chance and they look to be falling flat on their faces.