An extremely important part of The City hasn't really been relevant for anything other than giving the sinners IDs and i hope that changes in future Cantos

I'm talking about the 12 fixer association, who haven't done much or been explored in the story compared to every other major faction. They've been present in only 2 of the Cantos, in Canto 4 where Shi assassins show up and kill Shrenne and then leave (i actually liked this moment), and in Canto 7 where they aren't all that relevant either. And i think it's a shame that they haven't been even slightly important in the Story compared to every other largescale faction like the Wings and the fingers.