1. Flexible Trait!
At LEAST one or more traits should be freely changeable (not requiring any potions or rewards) Just imagine if you could be a couch potato for the weekend, or noncommittal until you met "the one", or a bookworm while at University but its not your lifelong trait. People are fluid and we change so much as we experience new things, people, and places.
2. Home delivery!
Some may say sadly but its undeniable we live in the era of delivery service. Sims should have an option for home delivery of groceries (yes I think we should have to stock our own fridge), items like books shouldn't magically appear in our bookcase, AND even better MEAL DELIVERY SERVICE! How about being able to buy ready made quality meals that come to our front door. These are actual things that should be options for our Sims.
3. Elevator for home use!
These days it is not unheard of for homes to have small single person elevators. This should not be a rabbit hole either, just have the sim step onto the platform and it will quickly take you up to your 3rd floor bedroom or whatever. One of the reasons I don't build multi-level homes is because the stair animation becomes so tedious.
4. Online dating!
I'm so tired of going to the park or to a club hoping to find a new romantic interest only to see the same sims. We have to create our own NPCs so the surprise is GONE. How cool to pic a sim from a dating app, go to meet them for a date, and find that they are nothing like their profile! or the perfect sim to be the father of my 85th baby.
5. Developed skill development!
I think skill building is way too fast and too easy in Sims 4 which is one reasons it lacks depth. For example, you do not become a master chef by just reading recipes or cooking the same thing over and over again. To pass to upper skill levels I think there should be more and more challenge to reach level 10 (this would also make reaching top of career more challenging).
To end....I LOVE THE SIMS and just want it to be as popular in 30 yrs as it has been the last 20!
Thanks for sharing the creative ideas, and I share your love for the Sims series and wishes for its longevity!! ⭐⭐⭐⭐