I mean, we know that Odyn as well as Bwonsamdi just straight out created their own realms and were grabbing souls before they arrived at the Shadowlands. And even beings at Val’kyr/kyrian levels were able to just grab a soul and put it wherever they liked, bypassing the judgement system entirely. So there could essentially be an unlimited number of afterlifes that have no relation to the Shadowlands, couldn’t there? An Earth Mother could just take the Tauren she wanted into her realm and nothing about the SL-Lore would prevent that, as far as I understand.
So… do the Shadowlands really matter that much? Even if they were the “default” or even the “final” afterlife, atherothian religions could still mostly be right - though not for the people we actually saw this addon.
Now, call it copium, but we need to mitigate the damage Shadowlands did with our headcanon in some way… and I am wondering if this interpretation is an option or if the lore actually contradicts it in any way.
P.S. Who knows, maybe Elune does have an afterlife of her own, and letting Teldrassilians to the Shadowlands instead was meant as a contribution she wouldn#t usually have made…