Found more ideas:
CAS
• Wide range of relationship options from Girlfriend to Great Grandmother
• Turn on and turn offs for relationships (Likes beards, dislikes red hair)
• Phobias we can choose or randomize (Fear of water, fear of lightning, etc)
• Likes/Dislikes should be separate from traits (Likes thunderstorms, cats. Dislikes hot days, meat)
• At least 5 slots for traits
• Traits build off each other (Hot headed slob wouldn't get angry over messes but a Hot Headed Neat sim would)
• The ability to choose which sex your sim is romantically interested in (or lack of interest)
• Ability to make sims pregnant in CAS
• Ability to choose occult status in CAS after creating sim
• Cheat to unlock all CAS assets
• More swatches for hair and/or a color wheel
• Option to save outfits you want to use later. Maybe townies could use these too
In Game
• Option to turn off phones permanently (also include land lines)
• Being able to swim in bodies of water
• Job interviews (need certain skills to get a job, university could play into this)
• Unplayable roommates
• Sims react to/interact with each other and their surroundings in interesting ways (Influenced by personality)
• Better long term genetics (red hair could skip a generation)
• Lot traits to dictate dress, activities, and even behavior
• If open neighborhoods, include traits for them such as poor, rich, quiet, active, etc.
• Combination of venues (functional café and bakery on one lot)
• Grocery Stores
• Always have the choice to follow sims to work, work from home, or send them off alone
• Multi tasking
• Basic weather in base game
• A tool to create your own traits and aspirations
• Choose frames and bedding separately (More customizable furniture in general)
• Free babies and include cars in base game so I don’t have to hear about it :D