I am all for anything that brings back the things from previous versions we all loved. My son wont even consider playing sims4, he says its too boring and I can agree. He loves what Sims3 became with all the expansions and goodies, functioning businesses, weather, islands, world travel, supernatural, magic, dating, romance, carnivals, pets, whole families, past, future and mystical worlds to explore. Every new incarnation of the sims starts off far too sterile from the previous version we have grown to love.
*I think the whole family dynamic is totally off without toddlers and that experience of growing up; potty training, learning to walk, talk, drawing on walls, making messes, figuring out how balls and other things work, learning what is funny and to laugh or telling nonsense stories.
*Children are good but we need more options for them. Home school, public school, private school, military school. Sometimes it is good to be able to send kids off and have them come back older and more educated.
*What ever happened to teen events like prom, crushes, that awkward first date, playing sports, graduation and getting that diploma, taking college or aptitude tests and going off to college or traveling the world to find your way, hooking up with a band, becoming a carnie at a carnival, studying art in a foreign country. A music career should be more than just a solo event, what about a band act and more instruments. Jazz quartet, orchestra, country bumpkins playing banjo and washtub, rock guitar bands; choreographer, stage designs, light shows, or managing a band and having the connections to get them the gigs to make them stars. There is lots more to that career that could be expanded on.
*College/upper education needs an over-haul from previous versions. In society today we have adult students that take classes online while working and raising kids or doing their college long distance, some do go to traditional college right from High School with that traditional college experience, frats, sports, parties and such; but college and advanced education is so very much more.
*Sims need a Simtube.com too so they can learn to build a boat, build a moat, bake a special cake, learn a new style of painting or a new craft altogether gain skills with quick videos or gain a part of a skill.
*Elder sims shouldn't all be the hip ol' granny or gramps still able to keep up with the kids. They should get new interactions like teaching younger sims, telling stories especially family tales to keep the family tree alive, who wouldn't like to know about crazy uncle Joe and his jokes or Silly aunt Sally and her passion for pink, baking cookies with Grandma, planting tips from grandpa, how to make an awesome new rug from old t-shirts, making a family quilt, building model rockets to launch in the backyard or at the park, rebuilding that old jalopy under the tarp in the garage and going for a joy ride then souping it up and making it a hotrod. I loved Grandpas farm in Sims3 horses, cows, and chickens to go with the gardening. It would be awesome to add things like making yogurt, cheese, sausages, burgers, steaks, more vegi's to grow or making wine, juice for the kids, outdoor pizza and bread ovens.
I could go on for days on the wishful ideas from past expansions. My over-all wish is better family dynamics, better or more choices for directions of simlife. Marine biologists, ghost hunters, paleontologists finding and exploring worlds, living a simple life on a farm or in the hustle of a city partying it up or a non-party life but still a good life. Creating actual family trees that are generations deep and Uncle Joe or Aunt Sue doesn't get forgotten just because Jimmy moves out of the family house, your family is still your family if your living in the family home, next door, across town or in a totally different city.