The most meta it can get Hilarious critique of Dan Harmons' own Story Circle structure, usage of tropes and being overly attached to fiction, and the biggest yet "in your face" idea - modern entertainments' only purpose is to advertise the merchandise. First - money, creativity second. It's like writers room cry from the heart, but, well, not overly dramatic. Also, expectation subversion at its finest. It's like they are fully aware of this shows' cult status and its' fans theories and attachment to this show, yet writers don't have much desire to get into this mold of sticking with the formula, giving character mandatory growth and drama. They made a statement in a very first episode - they want to do "a little bit of this and a little bit of that", not sticking to the formula, not giving everyone something, that is a staple in sitcoms - give some drama, make characters overcome it and learn a valuable lesson. And they are committed to it, not that they don't care about the fanbase, but they are trying to keep their creative integrity as much as possible, and I think it's really hard in modern era television.
But still, if there will be more classic story structure in the future, I have no doubt, they will pull that off even without repeating anything we've seen in the story machine moment.
Still, like I'm very sure Dan Harmon is very aware himself, I can see why people might have problems with that episode. It is too conceptual to be immersive, especially if you are unfamiliar with that type of humor.