Battlehelm043
Warlord
I've only played about 1 1/2 games so far, so this is based on very limited experience; but I've been fairly well pleased with the AI's responses so far. I've had attacks [usually early, I admit], but generally I've seen the AI respond to my play similarly to what I would expect them to. If I'm friendly, they now tend to respond accordingly. However, I have not found automatic renewal of friendships or alliances as situations change throughout the game. I've had civs go from allied to friendly, but refuse to renew the alliance or the friendship, to neutral (or worse) and sometimes back to friendly and allied, generally depending on the changing situation. In my current game, I've had a very hard time getting one friend to ally with me, even though I joined in an emergency to reclaim his captured city, which I did and liberated to him. However, so far, I'm generally pleased with the current system and the way the various leaders seem to respond to my actions.
I'm glad you are pleased; I just wish I could say I have had the same experience. My hope was that the game made each playthrough unique due to the "map" dictating your necessity. This I had hoped would translate to the Diplomacy as it was to some extent in BNW. As it stands right now I can directly choose how to have the AI treat me where as I would also like the AI actions dictate what direction I should take. Unfortunately with the limited Diplomacy options as they are once a DoF is made, I cannot react; which makes diplomacy moot and forces me to either wait and become Khorne incarnate or Science/Culture/Religion myself to the endgame. I myself am a big diplomacy player and love to use intrigue and politics to manipulate the world/AI as I travel to my intended end goal. In Vanilla 6 and R&F, I managed to get some depth out of the Diplomacy aspects but not much. I feel though that with this expansion being aimed at Diplomacy, we have somehow gone backwards rather than forwards with what can be done in game. In the end this discussion will be reviewed by the devs hopefully and maybe a future patch or optimization will bring about a change.
Still if you are enjoying it, I am glad you are!