First up, the injuries look great, and I particularly like the Angel ones!
Secondly, I've been playing a game as the Undead and when I loaded up again, the game started crashing at turn end or at save. Save game is here and debug is here, if they're of any use to you. I was actually very surprised as up to now the mod has been remarkably stable, I don't think I've had a single crash before today.
Thirdly, the Undead have played very smoothly so far but I'm not 100% sure if Crown of the Skeleton King is working as designed. Every time a unit hits the SK, the +stunned and -stunned messages appear in quick succession, whereas the description says that it has a 25% chance of causing the attacker's next turn to be lost. This save should let you fight an Umberdroth and see what I mean, it's from sometime earlier before the crashes started happening.
Hope this is useful!