I just bought the expansion and I've been having fun playing an immortal emperor game. Unfortunately, one new 'feature' is pissing me off so much. Coups of city states. I'm not 100% sure how they work, but I've lost like a dozen city states allies to these coups. Many, many thousands of gold and all the benefits. What makes it worse is that the owners of these spies are several civilizations that I devastated already, but I'd rather not waste the time to completely wipe out. Apparently, it costs no gold to stage a coup? Is espionage a worthwhile addition? Right now, for all future games, I'm seriously considering disabling it. Maybe I can mod out coups or something?