Quote Originally Posted by Rookie1 View Post
if you think about it as a pool of aether (soul or corporeal or memory) then it has to be spread out amongst all life. If you get a rejoining that doesn't mean the million people on etherys get denser. It means you can now support a population of 2 million people.
The problem with that logic is that it's mentioned clearly in the MSQ that the reason we can respond to dynamis is because we are less aetherially dense than the Ascians, that we got denser when merging with Ardbert and Krile expressing curiousity over why she wasn't less aetherially dense.

It's also constantly implied, even in Dawntrail, that souls are meant to be rejoined - with alternative versions of people we've met being found in the First and in Shaaloani and Heritage Found. The implication seems obvious - that if there was a rejoining, those souls would rejoin with the versions we know on the Source. Whether that's meant to be immediate or not I have no idea, but Emet-Selch once said that if there's a full rejoining "you have nothing to lose" because you're "of the Source" implying the Warrior of Light wouldn't have to die.