Patau, is there a chance for you to introduce types of white dwarfs during the weekend (in 1.1 white dwarfs can easily be found)? Or perhaps you've deemed them unworthy for some reason? We already have 5 types of carbon stars and white dwarfs are much more common so why not them?
Have you thought about my suggestion as to reorganize the book in order to have subtypes as subtypes, not types, eg. if water world is a type then terraformable water world should be its subtype, not another type (if I understand correctly the way you currently classify them the water world type should be, anyway, called unterraformable water world to avoid confusion). In this way we could also have subtypes of stars, eg. 0 - hypergiants, I - supergiants, II - bright giants, III - giants, IV - subgiants, V - dwarfs (main-sequence), VI - subdwarfs and finally subtypes of types of white dwarfs that I'm not yet certain what are like in-game (they could be omitted in the beginning). Without them, when the most obvious bugs are removed from the game, in every type we have now there won't be records (at least concerning physical parameters of bodies) from main-sequence stars (also not any subgiants and probably not even giants) - do we really want it? Additionally, having them the bugs would be more visible to FDevs. What do you all think?