For Occults:
Fairies
Imaginary Friends
Revamped Mermaids & Ghosts
I wouldn't say no to other occults, but they need to have a game pack level of depth.
Building Types:
Buildable apartments
Graveyards (with rabbithole crypt adventure)
Museum revamp (with active museum career, and ability to display your sims' collections--the graveyard could be a type of museum where sims can display/store graves and urns)
Items:
The TS3 rabbithole time machine
Gameplay:
Bands, with more instruments
Revamps for more active/WFH careers
Worlds:
Build-A-World, or at least a few genuinely empty worlds in different terrains with scenery but no shell buildings.
More worlds based on specific locations, preferably no more suburbs, and I'd prefer some locales that aren't U.S. based and aren't just generic ethnic land.