@Soul_Taker209, this is a lot like The Sims 3's Supernatural EP. Many people did love that pack, but it also had some drawbacks, namely that none of the supernatural Sims were that deep or fleshed out. TS4 has taken a different approach when they have a supernatural based pack released, like Vampires or Realm of Magic. In those, Vampires and Spellcasters are more fleshed out & detailed, and we can do more with them than we could in TS3's Supernatural. Many people prefer this approach.🙂
However, for some supernaturals that don't have as much to their lore as the big ones do, I could see this as a possibility, just not for the big supernaturals like Werewolves. For Werewolves and Fairies I would prefer Game Packs in the style of Realm of Magic and Vampires! 🙌
Also, Realm of Magic and Vampires are Game Packs not Mods. Mods are something a 3rd party adds to the game that makes it behave differently from how EA intended. EA made the Vampires and Realm of Magic GPs , so they are not Mods. 😉
And yes, I think a great many people would love to have a pet dragon in the game! 🥳