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

[dapperfaffer]

That’s what i mean though. They had to involve all of this convoluted time travel to try and frame the sundering as semi-right when in reality it just isn’t. There’s little reasoning for her to have actually done it when they could’ve combatted meteion themselves, and it’s not like the ancients were without suffering. We’re shown numerous times how they suffered pre final days and even pandaemonium gives more insight on that, so that whole theme just comes off as pretty shoddy as well.

Hydaelyns actions were because she didn't think Zodiark would work, and it came at the cost of their lives. She had no plan other then how best do I ensure survival of life, and if it happens again how can life escape pre WoL.
Then post WoL nothing changed, except now we now the cause of the Final Days and what to kill to make it stop. So it gave another option other than flee from the fee-fees.
The traveling to Elpis was nothing more than exposition in what is largely an exposition heavy story as all it really did was explain what caused the Final Days in a convoluted manner. And to later explain the Hermes, Fandaniel, Amon and Allegan connection.