With the "Get together"-EP I can imagine forming a wolfpack to be really fun and easy to form.
I love your ideas of the sometimes not controllable wild nature of werewolves. That can really be fun.
I'd love to see werewolves to need to go outside, howl, hunt and in the end form packs (and for this purpose possibly spread Lycantropy).
A big thing may be the wild and sometimes destructive nature of the werewolves, that would tie in quite nicely withthe mischief-skill and perhaps even go after other sims when they start to strave.
A transformed werewolf should be much more like an untamed animal than a normal sim - until his shapeshifting-skill reaches a decent level. So no watching TV or playing the guitar, for instance. Blocked social interactions and even emotions (like inspired for instance).
In the case vampires get added too I would love to see mechanics that enforce the natural hostility between werewolves and vampires, too, and make it an efford for the player-werewolf to befriend a vampire.
And - very important for me - normal sims should freak out (panik or faint) when they see a werewolf they don't befriend. Being a werewolf in Sims 3 did feel more like being a deformed sim with a compulsion to dig holes and fetch sticks than being a werewolf...
If the Team adds supernatural sims they need to be mysterious and gamechanging.
In this regard they did a fairly good Job with the Sims3-vamipres and missed it completely with werewolves...
They are not very balaced...
On possibility to impemet supernatural Sims would be to create a GP for every supernatural type, so players can get the supernatural species they want, and the developer can dig deep in every one of them and make them fun to play not only cute to watch.
Oh... I would love this...
