- Ever again allowing the Ai to interfere or take priority over player commands
- have multitasking that slows down both actions to preform
- Continue the idea of "vacation" world's. Have packs that add vacation activities and things to add to world's that act as tourist attractions. But just let all world's be livable. It annoys me a fair bit that because some place is not in North America it gets the novelty of vacation spot. :| that place is also often someone's home... just saying (looking at ts3 specifically but they all do it to different degrees)
- continue the idea that university is it's own world.
- uncontrollable pets (yeah it's a love hate thing but I believe a sand box game should always offer more options)
- no terrain tools
- no color wheel
- Make or use a base that doesn't allow for toggles
- the emotion system and traits, no system should disrupt a personality of a sim.
- Apartments that can't be made
- recycling buggy content (active careers)
- world's that can't be adjusted at all/inability to add more build space in a save
- foundations that are universal on a lot
