It would be nice to have an exotic animal pack, you could have reptiles, arachnids, wild cats, birds etc it would be great to have more pet options. Also I really miss being able to have a ranch like in Sims 3 so it would be cool to have a pack with horses and ranch accessories.
Most of all it would just be great to have more hair and outfit packs, the long hair section doesn't really have a lot of choice and the updo section could do with some more fashionable hair styles and everyone could always do with more outfits.
I also like toying with the idea of being able to make your sims into fairies (again I think this was a sims 3 thing but I miss it). Just bring everything you had in sims3 to sims4, that would be great lol
