absolutely wholeheartedly agree!
sims supernatural was my fave in sims 3 and out of the options available faeries were my favourite!! i loved how they aged significantly slower so i could max all the skills i wanted and then work on the skill journal and the faery tree house thing.
as many have said, if occult sims came as fleshed out as vampires that would be amazing and for-sure worth the price of an EP (some, IMO, have been lacking and not worth EP prices). i too would like to see elves added, i love having pointy elf ears on my sims and it would be nice to have a 'good' immortal to be the flip side of the 'bad' immortal vampires.
i think a supernaturals sim4 could come with a whole world that has occult sims and townies living in it, and only it. we could also have a tick box that would turn occult sims on for other towns for those that may want to complete the sims4 collection or use the CAS/BB items that come with said pack but not the occults themselves. this town could be set in the past potentially before electricity so there are different clothing styles and items to use. i for one, would LOVE, the idea that we could bring our sims into the modern age with each generation that passes and catch up to the worlds of willow creek etc
i too would like a ghost overall so theyre actually ghost like. id also like items that prevent ghosts from entering the house uninvited regardless of if they were a previous owner/occupant of the house. i WANT a cemetery lot back too! it could come with a part time job/new NPC - the groundskeeper and a crypt like in sims3 to explore, who as the name implies keeps the lot tidy but also seems to never age, and tells sims stories of people buried there or of hidden treasures. if we got a ghost hunter career the hunters may have to interact with this person to help solve cases
regardless of never playing them, id still like the witches, werewolves, mermaids, genies, ... im forgetting one i feel all back and in addition id like elves for sure, maybe orcs, proper ghosts AND zombies, androids - could tie into a future ep like in sims3, and i agree with proper plant sims too.
apart from the ghost hunter job it could add a medium or psychic job, definitely bring back alchemy, and it would be nice to see more rustic or medieval (i LOVE sims medieval) BB items like stone or wood with proper hay roofs, and wooden furniture and candle light type things so we can at least pretend our immortal sim has lived through the ages and is yet to catch up with all this 'newfangled technology'. itd be great if our occult sims could be detached from the mobile
any supernatural be it my least played or not would be automatically added into my house as it would be something very new and exciting