My wishlist:
occults:
fairies
genies
proper plantsims
pet dragons
gameplay:
hotels (no rabbit holes but being able to build them and stay inside)
hobbies (more instruments, sewing, pottery, ballet and karate as after school activities,...)
updates:
unlock occult skin tones and pointy ears for all sims
unnatural hair colours for all ages (blue skinned kids should be able to have blue hair)
update to swim in all worlds
update to make selvadorada and granite falls residential
update base game careers to have a work from home option
building:
terraced houses
a few more apartments
spiral staircases
Worlds:
a medieval/fantasy world where sims can visit but also actually live
a futuristic world where sims can visit but also actually live
Most important are hotels, pet dragons and fairies. The rest would be nice but not essential.