I don't know why I see so much people complaining about World Congres... Am I the only one who was really a fan of it?
Well, yes, it was a little restristed, and the AI should have a better intelligence to really deal with it, but overall, I see pretty much only advantages. International Games, World Fair ou ISS was great things. And I think that adding a mechanism that force different countries to deal with each others a great thing.
But I think it would be better if it's an enhanced version of the actual WC/UN.
Besides that, what would be the point of WC? Well, Diplomatic Victory. For me, it's really bothering that you couldn't win by Diplomaty, as it was a great way to win with the opposite of Military. But it's just my opinion.
On the other hand, the concept of emergencies will be great, I think. It will permit the creation of "regional" unions. Maybe, in the future, it will be possible to create local multilateralist unions, without the need for emergencies, lile the UE or something.
But the fact that you can be allied with multiple civ at the same time, it's just... so hyping! Except if the AI will frak it...