Yes that would indeed be neat. Although we still wouldn't be able to witness that world. At least not as our current reincarnation of the WoL. I REALLY want to save them and frolic through the flower field with Emet-Selch. Preferrably Shadowbringers Emet-Selch who has seen shit because the Endwalker version felt like a watered-down basic Tsundere trope version of him. ShB Emet had way more depth and charisma IMO. It would also be great to see that version untempered and see him cope with everything he did while being tempered. Although technically, Zodiark wasn't evil and so not sure how much the tempering actually mattered. I also have to agree when ShB Emet-Selch says that he cannot be held accountable for murder because he does not consider us to be truly alive. I thought the same way even before he said it. After seeing Amaurot, I felt that the world around me wasn't real anymore and I'm fighting to keep alive these lifeless husks while preventing them from actually being saved in my childish ignorance.
I think whether the current people of Eteirys should be considered "real people" or "really alive" is a philosophical question that is colored by your experience. Our equivalent to Emet's experience would be that Venat took everyone and made it so they can only survive for one day. Is life really worth living if you only have one day? I remember recently seeing some Twitter post where someone tried to be inspirational and asked what people would do if they only had one hour to live and most people responded "I'd go to sleep." Most players have experienced life as a sundered person and this is the normal, whereas Emet-Selch has not only known eternity but he has also lived the lives of the sundered over and over for thousands of years and still finds the sundered wanting to be stewards of the star. He doesn't just say this because they are short-lived but also because they commit cruelty to one another. When Alisae then retorts back that he can't possibly understand because life is only worth living if you die it feels like this little shitty know-it-all is patronizingly talking back at someone who actually has experienced both perspectives while she only knows her own.
The only person, who doesn't feel like a know-it-all brat in this case is Gaia because Mitron did give her his memories and she still chose to stay with Ryne. Which to be honest also seems ridiculous to me that she would choose her teenage girlfriend over the love of her life... no ETERNITY that she has spent millenia with to fight for the salvation of humanity. For what? Cookies and tea with a 15-year old she just met (and couldn't stand a few days ago).
Anyways, maybe I'm viewing the story differently because of a Chinese drama I watched before playing Shadowbringers called Ashes of Love I think. There is a similar plotline that makes it more ambiguous who's in the right or wrong. Basically it's a story that is set in the realm of Gods and a young maiden fairy (only 50,000 years old!) falls in love with the God of War. We spend like 20 episodes in the God's world and get invested in this story, but things happen and she has to die and the only way to save her is to send her do a mortal trial in which she must bear 3 great sufferings or her immortal soul will forever be lost. She gets born as a deaf mortal who is deaf, abandoned by her family, and destined to die by her 19th birthday. If she doesn't die before her birthday, her soul will vanish. Problem is, the human version of her soul has no recollection who she once was and is basically a completely different person. God of War is basically watching her and trying to comfort her but knows she must die. Then another immortal comes and meets her as this human incaranation and falls in love with that version of her. At some point God of War reveals to her that she is really the soul of an immortal and that she must die to pass her trial and return back to the realm of Gods. But she is against it because she insists "the person you speak of isn't me. You are asking me to sacrifice my life so she can live" and the other immortal who is in love with her human form says the same and tries to prevent her death. In the end she begrudgingly decides to sacrifice herself so the fairy can live. After the trial the naive little fairy becomes an incredibly powerful Goddess and I think at some point someone asks her about her memory as a human and she says something along the lines of how her human life becomes less and less important.
I saw the Ascians dilemma from that perspective. They must sacrifice the WoL to resurrect the Azem but the WoL has really been Azem all along, she just can't remember her life before the sundering. It's not really killing the WoL as much as it is saving Azem's soul.