What is still missing from the sims 4 base game? (If anything)

A Fear emotion. Sims have no fears at all and it makes zero sense.

Traits that affect behaviors and aren't overridden by emotions so that Sims have unique personalities.

The default happy state changed to fine so Sims don't have a constant permagrin.

Adjustments and additions to animations that reflect the Sims' true moods. For example, enemies being angry at each other, not smiling and hugging.

Likes, dislikes and attraction. It seems like anything goes with every Sim and their behaviors are bland without flaws and turnoffs.