So, any progress on this idea? I see we had this discussion some years ago, but the author was focused on doing it for Dungeon World, which I'm not really interested. I think the basic idea would be:
1- having functional playbooks related to the setting's archetypes: I think this would inevitably fall on things like Rogues, Fighters, Planar explorers, Proxy champions, etc whatever they're called in the setting. The archetypes presented on Planewalker book could be a starting point;
2- Adding 2 or 3 options for race, again according to setting: Gith, Tieflin, Modron, etc with an associate Racial Move for each;
3- Having Factions as mini-playbooks the player picks at chargen. These could be a separate sheet with 3 special moves or so, and maybe some duties the characters should upkeep or risk losing status (and powers).
4- Link character advancement to beliefs or passions. How to do it, though? Ask each player to declare a couple beliefs and reward XP for upholding/confronting them on scenes? Perhaps have beliefs pre-stated on the Faction sheets?
Alternatively, what about discarding XP altogether and rewarding "Holds" to players as they confront their Beliefs, then use said "Holds" to activate Faction special moves?