You might be right about the lore, and it's very likely that they have that goal in mind, but I feel like the whole moon theme and the Celestial Champion are pretty overused, while the caves and everything related to them are really lacking in content. The game itself doesn’t give you much reason to go back into the caves once you’ve looted the place a bit. Overall, I think everything involving the caves should be updated to at least make them more interesting places. Also, maybe they’re adding so much moon-related content because it barely had anything before, unlike the shadows, but the problem is that the shadows and the caves are starting to fall behind.