Who knew the 6.15 Omega Quests… (Spoilers)

[Alenore]

Would love to see that last bit posted (:

For instance, in French :

Ce n'est pas avec nos méthodes qu'un être humain serait parvenu à mettre les pieds ici.

"Our methods wouldn't have brought a human here". I seem to recall the english version is not so far from that quote though.

The risk of extinction once one reaches the Plenty is 100%. The risk of extinction for a species like us is much, much lower. While death is a certainty in the long run for both groups, the chance of surviving longer is higher for the latter than the former.

Where is that 100% coming from, exactly? If anything, Endwalker means to communicate that the risk of extinction is 100%, since every species died in a way or another.

Hermes, the expert, is the one who really establishes the idea that the Ancients can't manipulate dynamis. A fact that leads to the creation of Meteion. And in truth the problem the Ancients faced was not an Ancient created problem, it was a cosmological constant. The only flaw in Meteions was that she couldn't separate herself from the answers she received, a product of her connection to dynamis. The real problem was in the certainty of suffering, death and extinction.

Hermes also makes the wish to find a way to manipulate Dynamis, as it would open incredible things. He does mention that he does not have such high ambitions.
The reason he created Meteion using Dynamis was so that she'd have a power source where there's no aether. It wasn't a way to experiment with another power, but a simple mean to an end: have the Meteion probes in the sky.

The more abundant form by far. Were we able to control it, we could open the door to limitless possibilities.
'Tis not unlike a gently flowing stream, unable to break through the dam of aether barring its path. But if we could imbue this stream with the vigor of a raging river...
...Not that I have such grand ambitions.
Nay, I merely wished to create a being that could traverse the great expanse.
The relative scarcity of aether beyond the bounds of this star was a concern, and so I looked to another source of energy by necessity.

Now no, they can't maipulate Dynamis directly, but they can create beings able to manipulate it. We can't manipulate electricity directly, or nuclear fission, it hasn't stopped us from building machines doing the job for us.

The real problem was in the certainty of suffering, death and extinction. That every species was either destroyed, or begging for death, or begging for death and being destroyed. When every civilization in existence is either gone or concludes that life isn't worth living, it pretty clearly highlights that something is wrong.

So the solution to other people being exterminated or wiped out by cataclysm, is making your race weaker. Quick reminder that a few cataclysm already almost destroyed Etheirys. Life does find a way each time, true, but isn't it the same for Dragons and Omicrons? Midgardsormr chose to flee and rebuilt his race on another planet. Omega doesn't seem like it's going to die either. Even the recreations of the Omicrons managed to find a new meaning.
What's to say people of the plenty didn't have an Hermes who valued life too much to actually want Ra'la to kill them?

She and her group seemed to move to prevent the third sacrifice, which in their eyes is a needless and ultimately self-sabotaging waste of innocent lives. Giving her people time doesn't really work when the condition you're giving them time to adjust to is about to be undone at the cost of bystanders.

Question is, did they move to prevent the third sacrifice, or because she knew that it had to be then and there according to what we told her? Just like she decided not to sunder the three Ancients because we told her they weren't.
She seems to imply she's going to stick to the plan when we go back to the present.

I appreciate your sentiment, I truly do, but 'tis a very long game that we must now play.
[...]
With Meteion free to pursue her designs, 'tis only a matter of time until the Final Days are upon us.
We must be ready. From fortifying our defenses to securing our escape, there is much to be done.
In spite of this, we cannot allow the report that set this calamity in motion to become common knowledge. Were the masses to learn the fates of the other stars, I fear the situation would spiral out of our control.
[...]
Regardless of how we proceed, if we are to permanently avert the Final Days, we must be equal to Hermes's challenge. We must prove that mankind is worthy to exist.
And this hinges, I think, on how we confront the all-consuming despair that accompanies a senseless and seemingly inevitable end.
Bewildered and divided, we would perish like the peoples of those celestial ruins.
We could not hope to survive the Final Days, much less take the battle to Meteion at her nest.
We must find a way to defeat despair. To unite and prepare as many as possible for the struggle ahead.
Heavy will weigh the burden of guiding this legion of souls...
[...]
And I pray you walk with me to the end.

If she even wishes us to be with her until the end, the plan of Sundering everything is already almost decided in her mind.

Not exactly. The Amaurot dungeon also describes how the appearance of a blasphemy led to the creation of many more as the Ancients became overwhelmed by fear and despair. From a purely strategic perspective, I'd actually say the Sundered are in a better spot. A single despairing Amaurotine may give rise to untold horrors, while a Sundered soul could be limited to one.

While a single Amaurotine may birth multiple horrors, they're all able to wield magic to fend for themselves (not the creation kind). They also don't lose their people when it happens, and it doesn't spread the same way. The situation when the Satrap dies is a perfect example, one person succombed to despair and it spread like wildfire.
Frankly I think both are equally awful situations and one isn't better than the other. It's a choice between summoning more assailants against losing people who might be helpful in reolving the crisis.