I still don't get why Venat thought not telling the Convocation or her followers about Meteion or about Dynamis was a good idea.

Like even though Hermes changed his memories so he would believe the Meteia exploded, he still created a new form of life that interact with a form of little studied energy. Given how much the Ancients liked studying and how much they respected and put weight on Venat's opinions and words, surely this would have helped them learn more about the true cause of the Final Days and possibly come to another conclusion that would have satisfied Venat's test (that nobody knew they were taking). If the issue was the Ancients wanted to return things to how they were, then shouldn't the Ala Mhigans be judged for wanting their city back instead of just accepting its loss? Why should Ishgard decide to pursue the old peace with dragons if this is just an attempt to return to a more peaceful past?

Even with the extra sacrifices, I feel that the Ancients would not have been able to return to their past how it was before. The memories would not vanish, the truly dead will not come back, and the children born afterwards would need to grow and overcome the trauma of the earlier generation's catastrophe.

The idea that the Ancients would have fixed everything and gone back to their perfect society is an assumption that the game doesn't confirm (and it doesn't confirm my assumption either, to be honest.)

The idea of Venat yelling "A TEST OF YOUR RESILIENCE!!" is funny though.