suggestion/ideas that sims 5 should include in the game

Most things have been mentioned, like height sliders

and with that more options to change body parts independently to make more realistic people of different weights.

The MAJOR thing I'd like to see is some type of item ownership option for both rooms and objects. 

I hate that Sims do things like wash plates in bathrooms, or going to other Sims to use their bathrooms, computers, or TVs, grab each other's instruments or whatever.

simply being able to flag items and room spaces of who SHOULD watch or use it is... perhaps a weighted priority.

that way a Sim will prioritize going to their own room rather than the closest TV if they want to do something.

also the ability to flag more than just a bed belonging to a Sim but the actual room block instead. in a big house one room could have its own bathroom, maybe a reading room, a makeup closet, sunroom, or whatever attached to it, and each individual area should be able to be flagged as being owned by one or more Sims, so other Sims in the household will avoid