What would you like to see that most likely will not happen

A way to invite sims to bring their whole household to visit you if you don't already know them. I'm fairly sure Sims 2 had this option.

Swordplay as as a skill of its own, not tied to the acting career. My historical and fantasy sims are missing out.

The ability to customise the length of individual seasons per world, or even omit some altogether. This was also possible in Sims 2 in a sense, I can't remember if it was in 3. Alternatively, the ability to disable certain kinds of weather in individual worlds.