Seems interesting. I find a lot of the event systems are quite interesting and offers good randomization (when it's not the somewhat to common "1-3 of your farms are destroyed" event).
A suggestion might be just as you can build diplomat units and missionaries etc perhaps a "spy"-unit that you can build (it could also use papers, sort of like your "fake identity" to boost the numbers or trigger espionage events?
So they sort of "spread espionage points" when consumed just like a diplomat or missionary. Perhaps then also a spy-hunter (inquisitor) to purge (or try to) purge spies from a city. I'm not suggesting these replace the normal espionage but as a compliment.
A suggestion might be just as you can build diplomat units and missionaries etc perhaps a "spy"-unit that you can build (it could also use papers, sort of like your "fake identity" to boost the numbers or trigger espionage events?
So they sort of "spread espionage points" when consumed just like a diplomat or missionary. Perhaps then also a spy-hunter (inquisitor) to purge (or try to) purge spies from a city. I'm not suggesting these replace the normal espionage but as a compliment.