Haven't played the game enough to comment much on the city building aspect. If you can place prefabs on top of each other that's absolutely something I'll be building huge mega death towers with later on, because of how much I like doing that in the game Rust. I liked the Red Rocket place, so I put a turret there and invited a settler over just to have some company (I actually took her fedora for my neckbeard avatar), but it doesn't make or break the game.