I said it's on the level of being just a dream. All of Aionios is undone even if we eventually regain the memories in the new world. That's how a dream works. None of the events besides escaping the dream of are of any real consequence. Unfortunately, those events are 95% of what we do throughout the game.
The theme is inconsistent because they don't fight against the status quo of annihilation. They just accept it as unchangeable fact. They don't fight against being torn apart at the end, they just accept it. There's so much they accept and don't fight to change. The story is simultaneously about coming to terms with your lot in life and also about not coming to terms with it and fighting to change it. And from the perspective of our main cast, that have no idea what's going to happen anyway, it's downright irresponsible to destroy the only world they've ever known with everyone they've ever met in it.
If souls somehow lose no energy reincarnating and acting as origin's power source and creating new souls through birth, thats also a pretty physics defying system that lets energy come from nothing, unless each soul is only fraction of the energy of their parents soul. Then theres origin that can magically harness that energy to mend or break realities in just such a random arbitrary way as to allow for this story. It feels so inconsistently applied. But we just give it a pass for some reason to create this story. Maybe thats the better way to phrase it, it feels incredibly contrived. The entire scenario of the story that is. Why can people get teleported into the final boss fight in origin? Why do physical attacks have any affect against a ball of energy infused with a consciousness? Why can only N and M defeat him? They give surface level hand waving for these things but it feels like they just can have anyone do anything at any point without any prep work, like the writer is working with infinite blank checks. It doesn't feel like they set up consistent rules and then worked within those constraints to do something clever and even reasonable.
Then the characters actions within the story are dumb. Most of the cast doesn't even have any idea what they're actually doing in the final boss fight. Nobody bothered to tell all the lost numbers and colonies that success means losing everything you know. Maybe, one day, you'll reincarnate and get those memories back, but maybe you won't, you have no clue. Clearly nobody understands how origin works well enough to have any degree of certainty as they failed to predict this entirely nonsensical creation aionios in the first place. Instead they have blind faith that reality will go against their own understanding of physics and everything will work out, in incredibly irresponsible message.
If they are really going to go with everything being fine afterwards and the worlds separating and that shit, then don't just introduce the entire goal of the main cast during the final boss fight. They should have been discussing what will happen and how people feel about it and probably have to encounter resistance convincing people that aren't ok with that. That's not something to leave between the lines, not when you expect the player to be the ones carrying it out. Why weren't the characters shocked at the end that they'd be split apart? They just accept it off screen and are shown having come to terms with it perfectly, completely resigning themselves to fate.
People come to different conclusions because it's portrayed terribly and all of this stuff is arbitrary with no build up.
I don't know why I'm bothering to type this up. I'm done with the game, I'd moved on, I'm just getting irritated even thinking about it again.