I finally finished the "creation" chapters of the book. So the Overview/Core Concept section (the latter of which now is really about the core mechanic and not +every other game mechanic), World Creation, Character Creation, and Team Creation are finished.
On one hand, this feel like a small amount of content. On the other hand, it represents the biggest creation/addition of new mechanics in the entire book. The part of me that thought, "Sure, redo the safe house system by dropping bland upgrades and creating 32 new special abilities to replace them," was obviously bad at math...because making 32 special abilities balanced and interesting it a headache. Especially as these are being added to the 49 team special abilities and 108 character special abilities and 91 special contract abilities already in existence.
280 special abilities in-game. I think I have a problem with limiting ambition. And that's before I add the antihero playbooks.
The remaining edits fall into two main categories:
1) Writing up new rules. So not content generation per se, but still work.
2) Adding sandbox tools and random generation charts.
The second might be added in version 4.1 just so I can get the next version into playtesting sooner.