So what kind of stuff can you play around with? Well, as I implied in the introduction, the toolset is expanded in ways that allow you to get much more creative with your settlements. Thankfully, these go beyond animal and people-trapping, but in the grand scheme of things, it’s still an addition to the smallest and most inconsequential part of the game.
But what specifically? Well, put plainly, this is an expansion for people who are far more into complicated Rube Goldberg-esque machines than they are into Fallout 4. And even for those people, I have a hard time imagining them having the patience to work within the limitations of the core game's crafting and building systems to make the contraption of their dreams.
To be fair, some of the new items and systems at your disposal are neat. Warehouses, scaffolding, and conveyors can make you the Marvin Acme of the post-nuclear Commonwealth. You can make all kinds of wacky things, but you can aim for practicality by assembling factories that produce useful items. The problem is, most of it serves little to no purpose other than passing entertainment -- you get an achievement for building a pillory and assigning a settler to it. It isn't nearly as funny as it sounds. And the practical stuff, like ammo production? It's far more enjoyable to earn through combat and exploration. You know, the kind of stuff that makes Fallout 4 so good in the first place.