If I had to pick, I'd say they should have Vampires not Werewolves.
The Vampirism experience adds on to your existing playstyle, whereas fighting as a Werewolf is usually restricted to melee.
But I would be definitely happy with them both being in the game - slaughtering lycans is one of the funnest things to do with a vampire character
If there IS werewolves, they need massive boosts to their speed and jump height when transformed.