Definitely agree on the offline play, CASt and option to edit worlds. Would love the ocean liner!
Instead of an additional adult lifestage I'd scrap Young Adults altogether and add the one we need between adult and elder: Mature adult. YA would get used again for college students, but only for them. Pre-teens or whatever they would be called are definitely needed and teens need younger faces (same height as adults, though, I want to continue to be able to use the full CAS for them)
Adding to the list:
- Hair growing (optionally turn off, from Sims Castaway I know how annoying this can be at times)
- Layered clothing (There are so many shirts under jackets that aren't available in CAS as individual items, it's sad)
- Each world's climate to be defined by the player (part of edit worlds)
- Sims respecting their home worlds
- Politics career that can influence ingame laws
- Gamemaster mode where we can define how our worlds work PER SAVE (are there vampires? ghosts? alien? if so, do they abduct sims? does the alien government pay compensation? are there no cost foods? university tuition yes or no? density of crime? Careers requirering uni? Risk of metorite impact? And so on)
Other than that my wishes are niche, and not what would make the game survive another decade: Return to each household being their own save, the Sims 2 community lot time (return home and no time has passed, sims are still doing what they were doing when you left instead of random nonsense) and two more Autonomy off modes (the first getting rid of emergency needs filling, autonomous switching of conversation categories, autonomous toddler scolding/checking/watching and the like and the second being a true zombie mode for creating picture stories).
