I think one of the biggest lore tidbits for Endwalker can actually be found in Shadowbringers, where you and the Scions go to Anyder and see the old recording of Venat and her followers.
I admit one of the questions I asked myself after going through the Elpis arc was “Why didn’t Venat try to warn people more? Why didn’t she try to make the Convocation listen despite Fandaniel being there?”
As we see in Shadowbringers, her group did try to warn the Convocation…but no one listened.
Looking at the chronology of events, however, the warning came at an unfortunate time. The Convocation was missing two of the members who probably would’ve listened - Azem, the problem-solver, who had stepped down…and Elidibus, the impartial judge, who was now a primal.
Venat says herself that the Convocation was more focused on a short-term fix rather than a long-term solution.
It certainly paints an interesting picture of what life was like at the end of the Ancient’s civilization. Was Venat in the right for doing what she did? I’m sure you’ll get a different answer depending on who you talk to. But one thing is clear, the Convocation wasn’t the same without Azem and pre-primal Elidibus, both who would’ve been willing to listen despite it going against the norm. In the end, the entire Star suffered for it.