Yeah that part is solid. The lore is great for Vault and the Vex, but atheon just felt like "Oh, yeah! And here's Atheon!" I've seen lore videos that tie it all together in a nice way, but that should be done in game and not by a Youtuber. Aksis was the same way. Saladin was like, "Congratulations. You stopped Siva. There's still some out there, but you did it." And then Shiro was like, "oh hey, there's some Fallen claiming to have a machine god or something? Figure you could look into that. Just whenever you get time."