I can't believe I've never heard of the Buckriders! I love that you made them out to be a sort of dark version of Robin Hood and his Merry Men.
I rate this one a 5 in the writing department! For me where I struggle is wondering how I would give players more agency when going through the Scenes. I haven't played it, but it actually reminded me of Blades in the Dark, especially the planning phase, which seems really cool! I really like the idea of taking players through a setup scene or two before unleashing them fully to see how they fair. I think you mostly did that, I'm just not sure how I'd tie it all together if they go super off rails.
That being said, I'm pretty new to the OSR and not a super experienced DM yet hah, so what do I know lol.
In the keying, I really liked that you added the hidden rooms to their own section, I've never seen that before. Really fun read!
P.S. "Destroy your character sheets!" is absolutely what I'm saying at my next TPK XD