I would love some points system for traits back—but not tied to Zodiac signs again, though.
I’m against zodiac sign incorporation since my irl zodiac Sun sign (Scorpio) tends to get either terrible one-dimensional stereotypes (that doesn’t take into consideration the influence of Moon signs, Rising signs, and other astrology zodiac aspects) or gets misunderstood a lot...
I liked Sims 3’s way of doing traits as well, but it would be nice to add more depth such as points or the extent (strength) or frequency of such traits.
And, yes, I would love the return of detailed animations of Sims from the past older games such as opening/closing doors, entering cars, etc.
Supernatural beings from the past (like mermaids, fairies, vamps, werewolves, skeletal maid, imaginary friend, living scarecrow, mummies, etc) along a with some new ones would be awesome to see in future sims games again.