Here's my wishlist:
Gameplay
-Witches (includes a basic spell casting ability for children)
-Magic town as per Makin' Magic from the original game
-Fencing skill (after all, we can have swordfighting it in the acting career)
-University town and all that involves. All sims from YA-Elder should be able to attend as per Sims 3. I would like the majors as per Sims 2 though, because they felt more relatable than the generic ones from Sims 3. I enjoyed the mix of active classes and rabbit hole classes.
-Beach holiday area with ocean swimming, sandcastles, sunbathing, boating.
-Fear emotion
-Turn ons and turn offs
Careers
-Archaelogy
-Education
-Law
-Psychiatry
CAS
-Almost certainly never happening now but more hair colours!
-Scarf accessories
-Rainy weather category
-More clothes for kids, toddlers and elders
-More historical costumes
Items
-Sewing machine, ideally with some customisable outfits as per Sims 2
-Pottery wheel
-Spiral staircases
-Bunk beds
-Different musical instruments such as a harp and wind instruments
-More fun objects that aren't technology related
-Writer's notepad so you can write novels without the computer
-Shoe rack/coat hanger so sims can take off shoes, hats and coats when going indoors, and vice versa
-More historical items