Realm of Magic
I almost forgot. I beggggg EA to refresh Realm of Magic. With all the fun DLC that was added afterwards, there are so many more spells and interactivity to implement. I always felt like witches out of all the occults deserved the expansion pack title to begin with. Would be fun if my witch can control the weather, turn sims into any occults... etc. Just adding more cross pack compatibility with all the DLC basically.
I will say the world of Realm of Magic could generally use a revamp but that may be asking too much. It just bugs me that all these occults aren't well integrated with each other. most likely because they were introduced separately at different times.
I personally would pay for an expansion DLC (like a DLC of a DLC) for those who have purchased Faires, Witches, Werewolves, and Vampires = where all 4 occult's get a complete revamp and more cross play game play. Adding in a beautiful world with a new lore. Maybe something like each occult has their own "Supreme" or "Sage" that can be romanced, or over thrown to gain special/unique magic. like a Sims 3 Supernatural on steriods. Watching each occult duel each other in their own pay... etc. I know people would hate DLC for a DLC but I would think of it as a gift to occult players that have purchased all 4 supernatural DLC that live of occult playthroughs.