A "create a world" GP would solve a lot of wants for a lot of people. Obviously getting a create a world tool for free would be amazing but of that's not an option a GP would be a nice compromise.
You could be given so many "empty " worlds to build. You choose the climate and landscape then select from different layouts featuring various lot sizes and lot numbers, then simmers can choose what works for their specs. From there you work on adding world elements like trees, scenery, fake houses if you want them. The pack could include some well known landmarks and themes. Then the player can choose it all, want an empty island world? You got it. What a city filled with fake buildings and a glittering skyline? It's yours. Depending on what packs you own you could also get access to the stuff from those neighborhoods.
Also 100% I'm here for world packs. I'm a fan of the sims 4 worlds aesthetic personally. My only complaint is the limited number of lots. I would totally purchase world packs.
