The spaces I've seen ( three of them ) are most certainly not finished and the only way people have moved through them is by glitching. There were also a total of 0 enemies ( in the clips I saw ). I really don't understand why you are whining.

One of them is fully populated with a boss at the end, called an Ultra Captain. But you don't seem to understand how this works. Yes you have to glitch into the areas to access them, because they've been walled off to create the illusion that they aren't there. And they appear to not be finished because you lack the activation key to trigger them. But the coding is there, the design is there, the info is there and in one case the actual level is there but with none of the objectives. You can tell it was hastily cut by taking the ultra captain as example. The entire mission structure is in that level, but you just can't trigger it; so you can easily see it was a rushed job. I'm complaining because I don't like getting screwed by game devs and publishers who lock half their game behind a pay wall.