Thing from TS Freeplay that you want for TS4

Well... I'd say baby improvements.

To be honest, pre-teen life stage was just a child stage renamed, just like elder stage was renamed to senior.

Anything you said also ballet and woohoo in bath XD

I want preteens but I truly don't know how they were handled in freeplay so my vote goes to another because they did exactly what I want to see for babies in Sims 4.
https://www.youtube.com/watch?v=FBJqbJpbETs

The SHOPPING MALL AND FASHION DESIGNER ACTIVE CAREER!!!!!!!!!! WHY DO WE NOT HAVE THESE ALREADY!!! VERY UPSETTING!