I've only played two 1.5 games so far (on challenging), and it seems to me the AI is much more agressive and war-mongering. I find it hard to get past the late early game without someone declaring war on me. And since I play an isolationist strategy, their reasons make no sense "You decption is well know"...excpt I haven't attacked anyone unprovoked oe entered anyones land...so where does the deception come in?
Despite the new "attitude modifiers" fixes, the AI still seems to start wars for the heck of it.
I prefer to do quests and fight monsters, and then deal with the AI in the late game. The constant focus on fighting the AI factions early on is not what I was hoping the diplomacy fixes would fix.