I'm a little buggered about Nuka World being based around raiders. There isn't a single chaotic or evil (not that I consider raiders evil) faction in the the main game, so it's a complete 180 for your character, unless you've been ignoring the main story and just acting like a dick the whole game.
My Institute character became disillusioned with humanity and joined the Children of the Atom, in Far Harbor, so even he doesn't work as a raider. I like the premise, and I think it's a fun DLC, but there's nothing about the base game that makes it actually work as a story.