It will be interesting to see with the scandal action, what happens if the suzerain shifts during the action. So say Pericles is in the lead with 8 envoys, I have 7, and China has 6. I start the action hoping to take it over, but between when I start and when it takes place, China throws 3 envoys to it. Now, presumably, the action will be taken against China, however, if I was really playing the diplomatic game, maybe I wouldn't want to anger them.
Wouldn't mind seeing more actions there too, but again, we don't need too many. And If we're adding an offensive action against a city-state, we should probably add a defensive one too. If you could assign a spy to "counter-espionage" in a city-state, which has a chance of catching an opposing spy - but also has a chance at intercepting a rival envoy! - that would be awesome. Like, I throw one point of envoy on the city-state, but it's stopped by the rival spy and executed en-route, so I don't get the bonus from that. That would be an awesome way to defend against people taking over your suzerains.