I'm hoping something like this could be done. Even if it's limited to what we have now: CWLS and ability to form CW Parties.
It would solve so many problems people are having right now. Having to choose between your static and your friends is a decision lots of people are facing and if it's at all possible to make that choice unnecessary, then I think Square should be putting resources into making it a reality.

Our FC has been happily co-operating with another FC on Cerebus, after the split we will be losing our friends. We are both well established on our respective worlds and it's just not practical for either of us to move. There are too many people involved, too many houses would be lost (what use is gil when both you and your fc had your dream plots?), all the progress on one company's workshop would have to be sacrificed.

The split is going to cause huge disruption for a lot of players, some sort of link between the 2 US data centres, and a similar link between the 2 EU data centres, would go a long way towards alleviating it.