There are some good bits to Wasteland Workshop.
I use the concrete building pieces. Those could be a little bit better, since they're not the same size as the wooden and steel pieces, and they sometimes don't snap right. The concrete pillars are great cosmetically, but don't actually act as walls, so you have to put up walls, put up the ceiling, put in the pillars, and then remove the walls to get the right look.
The angled and curved concrete pieces are a significant feature. There are no player mods that do anything like that. Yet I never end up using them. I should, but I still end up building boxes.
The barn roof pieces are pretty good. Better than Snap N Build's angled roofs. You don't need to use other barn pieces to use the sloped roofs, they look fine with regular wooden walls.
The powered pump is stupid from a resource point of view, it's way too expensive in resources and power compared to, say, 3 regular pumps. I've still used it once I was rolling in materials just because it was more aesthetic to have a single pump. The fusion power generator is similar, very expensive for what it does, but compact and quick to put down if you have the aluminum to burn and don't want a big house full of generators.
It has those individual letters for signs. If you like signs, powered or not, those are good.
The cages and traps are the only thing that makes Wasteland Workshop feel like something more than one of the bigger player mods (like Snap N Build or Homemaker), and they're crap.
If all you wanted were concrete walls, and you didn't have Wasteland Workshop, there are player mods that do that. They're not as good as Wasteland Workshop's concrete walls, but they get the job done.
EDIT: Come to think of it, there's a global feature of Wasteland Workshop that I forgot. Those common, inexpensive concrete shipments that all the vendors have, including your own junk vendors. They make it much cheaper and more practical to build elaborate settlements, provided you're willing to use concrete a lot.
Prior to Wasteland Workshop, walling in just one settlement with a set of concrete foundations to give a fortress look used all the concrete I could find or buy. Now it's something you can do routinely if you want.