So I was re-reading The Musashi Flex, because Siblings of the Shroud is a direct sequel and I need to remember what I said. And I came across a throwaway reference to the Enforcers -- the people who deal with Flex players who violate the rules of the game.
Huh, I thought. There's an interesting idea. How skilled does an Enforcer have to be? I wondered. Given as how they are the ones who take out expert martial artists who need to be taken out, I'd expect they'd have to be fairly adept.
Opened up a whole new line of wonder, that notion.
And as a result of coming across that bit, we'll see at least one of those as a character in the upcoming book.