sonicmyst
Emperor
With my first playthrough (did it raw without reading much about the new systems) on prince, the biggest take home lesson: its good to be a warmonger again!
I had just denounced Alex as was going to wait the x turns before doing some sort of causus, but the Era switched so I was able to take the new golden 'go to war' perk ( = light WM penalty)
In defeating him, I liberated a city state that was next to Persia.
Persia decides to conquer the newly liberated city state, thus triggering an emergency that I get invited to. As it happens, my troops are still sitting inside the borders, so it takes a single turn to 'win' the Emergency.
Here's where it gets wonky...after re-liberating the city state, I tried taking a Persian city as well to see what would happen as far as WM penalty. Penalty = 0. So I keep taking taking Persian cities and then the capital and then wipe him out completely. Zero WM penalties. Everyone (that I wasn't at war with) still loved me!
Then Tomryis caused an Emergency by conquering another CS that I had envoys in so I get invited to that one too. And so I wipe her out as well, again with zero penalties.
3 Empires wiped out in less than 50 turns, zero WM penalties. Not sure if this is what they intended, but I do know I'll be spreading envoys to CS near aggressive civs to get invited to Emergencies more often.
I believe this is a bug. It happened to me as well. Chandragupta captured the peace-loving Geneva and I was invited in an emergency to liberate them. It so happens that I was pissed by Chandragupta that after liberating Geneva, I proceeded to capture 4 more cities from Chandragupta with 0 warmonger penalty. This happened during my Heroic Age but I did not select To Arms dedication. It's crazy and unbelievable.