The ability to group worlds Together

I can't imagine something like this ever happening, but I would greatly appreciate it, too, if only to avoid the unrealistic situation of the same NPCs showing up everywhere you go. (Looking at you, Eliza Pancakes.) If I were in charge, I would remodel the world selection screen into a world map of sorts, with freely movable icons that are literally grouped together in different places on the screen to create those world groups.

Even better if we could name each individual group, and make one of the worlds inside its capital. This is how the world of TS4 already works in my head anyway, I've divided it into four distinct regions in the four cardinal directions, the City, Desert, Countryside and Highlands, with San Myshuno, Del Sol Valley, Windenburg and Mt. Komorebi as their respective capitals.

Other than making vacations more meaningful, a feature like this would also provide a great opportunity to introduce cars and public transport, making it so that sims can still explore their closest surroundings on foot, but have to resort to other means to get to a place farther away.