I could be wrong (I often am) but I think we may just have a simple misunderstanding with the Dev Post:
They used the term "Cross-World" not cross-server. I think perhaps they meant an Open WorldQuote Originally Posted by Bayohne View Post
Also, while it won't be an easy task, we are also checking into the discussions for a cross-World instant party creation system.
Event that people from "across Eorzea" can participate in. Kinda like FFXI Besieged but instead of relying on LS-mates who happen to be there informing you it is about to start, perhaps you sign up in advance and are notified when the event is about to start. You can quit what you're doing and join the "que" and be auto-partied with others for an epic battle.
If this is not what they are thinking...I kinda hope they think about it a little more. These are 2 good suggestions to consider:
Quote Originally Posted by Belial View Post
However, I would like to see a game mechanic introduced in place of cross-server instances, in the form of open-world events. This would promote server groupings for something other than instanced content (which some of the playerbase opposes) and still allow for people to be involved. An on-going event which players could jump into may be a great twist for this game. And although this a poor example, it is one nonetheless, but Rift has open world events in the form of, obviously, rifts tearing into the world, from another. Although I don't want to see this kind of inter-dimensional aspect in FF, I think something like this could work well. For example, creating a small open-instance/world zone where we can join the front lines in a fight against the Garlean Empire.