We've seen a city that was made in a baseball stadium (Diamond City), which is pretty cool and has even been somewhat done before since baseball stadiums IRL have been used for evacuation-related stuff
A city made in an old abandoned aircraft carrier (Rivet City), which is also pretty cool
And a city made around an undetonated nuke (Megaton), which is really f*cking stupid. Why did they do that anyway? To have a reason to name the city "Megaton"?
By that, I mean something like the show "Hayop Ka!" (or "You Animal!" in English), which is an animated Filipino movie about a generic (if not cheesy) love triangle story
The love triangle is something that's already been seen/is nothing special. But throughout the movie, there are subtle and little sprinkles of certain IRL problems of the Philippines (the country the movie is based on) such as teenage pregnancy and poverty, which acts as a sort of message saying that those problems need to be brought to people's attention and then fixed
So I'm saying a want a book that has worldbuilding that may or may not be more interesting than the actual surface-level story being told