We’ve been playing a few sessions now and I just really, really like this system! I hope you (or someone) adapts it for pure fantasy.
I think the most genius thing that separates it from other PbtA systems is Face Adversity. Being flexible with that move seems crucial, and I love it!
The only thing I would change is that my players rarely use Assessment, but love the “Deduction” move. Other systems (like Dungeon World) allow their “investigate” move to force the GM to reveal the truth about a lot of different topics, I think Assessment could be tinkered to provide that support: players love forcing the GM to reveal things, and it’s good for the GM too!
I have a simple FBH rules question: is “Lay on Hands” supposed to buff “Alchemy” and “Inscribe,” since those moves also use “Patch Up?”