Hi Boltgun,
I noticed your mod a few days ago and I've been playing it in my free time ever since. I really appreciate your work. Modding succubi as a playable race brings in some interesting moral ambiguity into the game (even more than with Orcs or Warlocks as playable race), as Dwarf Fortress mostly follows the classical fantasy dualism of good (dwarves, humans, elves) and evil (goblins, kobolds, demons).
Since I like the original ascii tileset, I'm using the vanilla version (pre-created windows build). There were some crashes, but these had not discernible pattern and were more of a nuisance than a real problem. This also goes for two minor bugs.
To me, two issues with in-game texts are more important: 1) The embark text is still written from a dwarven perspective. 2) Succubi/Incubi apparently don't have any variation in hair colour; their description either says: "Her/His hair is pumpkin." ,Or: "Her/His pumpkin hair is wavy." I've used to imagine Succubi with predominantly black hair; of course, this doesn't need to be the case, but why the colour pumpkin? Shouldn't there be at least some variation? (There is a great variation in skin colour, though!)
Also, I've read this whole thread, only skipping through the parts discussing the fixing of some bugs; there wasn't much on Succubi mythology, although you did mention lore linking Succubi to hell (?) as a long term goal in the initial posting. I've got a lot of ideas on this, so if you're interested, I could share them.