An easy fix would be to "use" the VR-systems. Since the little room in the Bastard is capable of creating the whole mansion, it would be possible to simple upgrade the quarters with a bunch of those. Each passenger would have the possibility to create a place to there liking and even in the shared rooms (f.e. Thim and Vess) the passengers could create two separate houses and design the interior how they want, even giving them privacy.
Combined with the necessity of a new core to maintain the higher energy consumption it wouldn't be to far fetched imo.