I’ve cleared away much of the recent rambling about design options. The comments received here and elsewhere have been useful in getting me to review lots of options.
The practical upshot of this is acceptance that it’s time to change course, as the tabletop RPG industry is not the place to make significant progress on reducing dependency on fixed narratives.
I’m planning on developing a solo game and a few other fiction projects. I’ll put what I’ve done of the Spinechillers and Silent Killers content into lists without commentary and stick them on DriveThru at some stage.