A few weird things you've probably already noticed:
1) "Embrace Mortal" and "Embrace Werewolf" are both valid targeted decisions for werewolves in your court.
2) If you attempt to embrace a werewolf you either successfully create an abomination or kill the werewolf... even if the werewolf is a vassal. This might be as intended, I don't really know if creating an abomination vassal is at all desirable, I haven't really read any lore for 15 years. But even if creating an abomination is an unmitigated, hopeless disaster, it seems like a werewolf should have a chance to kill me instead, or at least get away. They're not imprisoned, just at court (or ruling their own territory.)
3) When searching for potential plot backers, often people will have the hand icon indicating that a bribe would make them willing to back your plot... however, I've never had someone actually become willing to back my plot by giving them the interface-solicited bribe.