Quote Originally Posted by Lyth View Post
This is more your area of expertise, but I don't recall HoH all providing that much additional information to Crystal Tower/Allag lore, outside of a loose reference to Desch and Salina to tie it all together. And while I'm sure G'raha will make an appearance, I'm guessing this will be more centered around Krile and her father's history. Otherwise you'd just cheat and scan G'raha to unlock the next floor. You might get some bonus dialogue for completing HoH or Eureka, though.
It wasn't Heaven-on-High itself, exactly, but the implications that there's a shadow organization spread out across the world dedicated to keeping Allagan artifacts from being "misused," HoH being one such artifact. That information is only acquired during that particular quest chain, but it seems unlikely they wouldn't have a stake in Eureka, assuming it's anywhere other than Syrcus Tower. Some of G'raha's small talk during Endwalker's MSQ suggested the Corvosi G have a similar role (and it seems likely they could be one and the same). I don't think they'd turn all the Corovs setup into a Deep Dungeon, though.

I guess I'm still wondering where it is on the assumption that it's gone from "under CT" to "anywhere but under CT." I suppose the devs could finally make use of the Unfinal Coil entrance in Coerthas by the Mor Dhona zone wall.