I'll just toss this random sort of thought out in here, because it's not well-formed, or well-researched enough for a thread.
While "wrestling" with my two year old during church, something of the sermon got me thinking (recently was the
Assumption of Mary):
Mary (not Jesus) is how God enters the world.
What does this mean in the context of tSA though? It's Esmenet who is mostly the "Mary" analogue in the series, because we know that Mimara is really the prophet, really the "voice" of god. Not only that, but Esmenet is also that which the No-God enters the world. And if Kellhus is to be believed, the Darkness that afflicts him.
So what? But this means that most of the actual Second Apocalypse is predicated on Esmenet. She is the crux of everything that happens. She is literally the most important person on Eärwa, really. I don't think we'll ever know why though.