I just picked up this book, and so far I'm really digging it! I'm a huge fan of items and load in FitD games, and the work you've done with load in this game (especially how it relates to magic and spells) is an inspiration. I'm in love with the bandolier and all the alchemicals especially. I can see a lot of Band of Blades in the game's DNA, and I think you've applied things like level 5+ harm and the heritage traits really well.
Couple of things you might've already caught, your early "explaining the rules" chapters reference a few things like actions directly from Blades in the Dark.
Keep chugging along, I'm very excited to see what you add next!