What's the point with that quite lackluster story in Endwalker?

[CrownySuccubus]

If you were to take over Ishikawa or Oda's position in the story and rewrite Endwalker to "fix" the story, or an expansion pre-Endwalker, how would you go about it?

Remove Elpis entirely.

The Endsinger is just some unknown, alien entity from beyond the stars. There was no reason she needed to be conveniently from Etheirys. To learn the truth, we go to the surviving members of the First Brood (Vritra, Tiamat, etc.) who all have bits and pieces of clues that Midgardsomnr gave them about what things were like in space, and from their testimonies and Echo hijinks, the Loporritz piece together where the Endsinger is in space.

Bam. Done.