Thinking about it 'Motherlines' might not be quite what you're looking for either, as there are no men around to interfer with the matriachy in that book. Still it's not sunshine and rainbows, although it at first seems much better than what the main character has come from. Can I suggest 'Daughters of Carhullan' by Sarah Hall instead then (do-over recs!). Again no shiny happy land of women, just a community in conflict with good bits and awful bits, who eventually end up unable to remain isolated.

Ah, I can see why Yeine's fate would be a bit of a problem then, hadn't thought of it that way. It does seem like Yeine transcends the knowledge of both humans and gods, to become the god who knows the most, now that you mention it. Maybe this is for drammatic reasons, like they need an arbitrator who has that raised knowledge level to prevent all out destruction, but I can see how it would cut your connection with a character all the same.