As a werewolf, you do get a minor regeneration bonus during combat, so there is at least one positive! XD
I felt that being a werewolf should grant some supernatural insight, one that would be particularly keen if it involved the player's freedom. There were also other minor problems, like having to figure out an elegant way to handle the werewolf transformations while being a slave and how that might sit with your new owners.
If someone has ideas for other positives or scenes/events which should change when you are a werewolf, feel free to share (Ideally, do it for individual changes, so it's something that I can add quickly without messing with my current plans).
The reason I didn't do a vampire transformation, is that it would change too much (going out at night only would require a re-work to lots of situations, or to make it into a bad end) and it doesn't particularly fit the relationship with Beatrix.
If I had to guess, the game was added here a while ago when there wasn't as much content, and the tags weren't updated (it wasn't me who posted the game here originally, I didn't even know about F95 back then, if I remember correctly).