You can call me a cynical prick, after my first wave of excitement about Rising Tide's new features died down I'm becoming more sceptical again. The issue is that for all the talk about a new diplomacy system, I haven't seen much diplomacy. Yes, you can trade traits, but unless there are still parts of the UI that weren't shown or aren't finished yet, that seems to be all. I see no option for bribing others into war. I see no option to directly trade resources without trade routes. I see no option to trade energy. I see no option to actually influence other Civs' behaviour, which is what diplomacy actually is.