-Cost of travel relative to distance between lots (100s-1000s between worlds) (0-20 between neighborhoods)
-Restrict sims autonomously showing up in worlds other than their own (why is Bob Pancakes always in Oasis Springs etc? Get him out of there!)
-Ability to use empty (furnished) lots in all worlds as vacation rentals
-Ability to live in destination worlds (omg!)
-Extended visits with friends in other lots/worlds (a la couch surfing)
-Hotels
-World explorer aspiration using photography, couch surfing/house rentals/hotels and museums/parks
-Option to customize each NPC upon spawning (no more "ugly" NPCS as beauty is in the eye of the beholder)
-Ability to assign NPC jobs to our played sims (maid, nanny, gardener, repairman) so they show up in that role (in their world only) and get paid to do it (for all the maids, repairmen, nannies, rangers, directors, firefighters, mail deliverers etc out there!)
-Ability for sims to own community lots and charge use fee (spas, bowling alleys, bars, lounges, pools, etc)
-Business owner, restaurant owner, Scientist, Doctor and Police aspirations
-Mixed use lots (pool/bar/lounge)
-Bands, touring, songs on the radio, neighborhood->world->universe levels of fame and fans
-Attraction system
-Secret crushes
-Rivalries and competition
-Farming and farmer's markets
-Home based businesses with distinct open and closed hours
-Private school
-Elementary school grade impacts High School grades
-Option to turn off relationship decay (for rotational players)
-Unfriend option in relationship panel
-Childhood experiences/skills influence trait options upon aging up
-Summer break from school
-Ability to customize the exact number of days per season
-Unplayed sims change their outfit by clicking on them
-Give makeover to unplayed sims through any wardrobe/mirror (Mean Girls anyone?)
-Option to set household funds in CAS (some people have rich/poor/generous/stingy parents)
-Personally I would LOVE to have to purchase each piece of clothing with simoleans with the nicer pieces costing MUCH more than the more worn or scroungy pieces
-Photo-albums for each sim comprised of photos taken while that sim is selected for storytelling purposes
-Funerals
-Last will and testaments (large inheritances ;-)