I just left a post in the grocery store thread about what I'd like to see for grocery style retail. I still think that could work if paired with a backyard farming concept that let you own chickens, maybe a cow or goat and make preserves.
Anyway, besides that, I would like a sequel to GtW, that has more active careers and lets me own more types of community lots and has the hairdresser option that I miss from Sims 2 OfB. No new retail options, just options to own entertainment or service venues with a different mechanic than retail so you're not duplicating what GTW has and you don't have to own both for the new one to work.
