Hey, was getting into hacking up my own Sword-and-Sorcery game, and found this. Enthralled. Your touchstones are obvious in hindsight, and I've been desperately trying to engineer some greater-than-the-whole mix of PbtA and Blades.
I would offer to help with the production, but it sounds like you've already got everything covered? If so, good luck! I'll be looking forward to playing and developing content for this game when it comes out - empire-factions, playbooks, all that good stuff.