Nasty nasty nasty. Could do with a content warning for some players! Clever design and layout. I agree that this would really benefit from another page or so just to flesh things out. The decoherence stuff is cool, but takes up a lot of space for what it is - it's a big ask, but would you cut or simplify it? I appreciate it is currently functioning as a second axis of threat, but it's thematically operating in quite a different space from other aspects of the adventure.
I quite like the idea of using the ship as a more permanent campaign fixture, and you've provided the support for that. The red immortal adventure part could be spread over the course of various other adventures, and needing a constant supply of blood is a great and unusual motivation for the crew.