After the announcements at Fan Festival NA, the biggest letdown from a community perspective was the datacenter decision. Instead of merging NA's Aether and Primal, the decision to create a third was made. The extra datacenter is going to split up some friends who play on the current set of datacenters.
The server visitation feature is actually a very welcomed change and could be the key to merging the regional datacenters. As it stands right now going into Shadowbringers, we can visit a friend's server by visiting an aetheryte.
Would it be possible so that when we queue up for an instanced MSQ/Job/etc quest, the backend can have the player automatically visit a low pop instance server to complete the quest (no more Raubahn EX)? After the quest we can load back to our original world as if we had used the new visitation feature. The tech is pretty much created. Automatic load balancing is the only tech that would need to be created.
As it stands right now, another mega server or two like Balmung will be created, so the datacenter addition will have been for naught.
If this is possible, people wouldn't have to leave their friends behind, houses will not have to be given up, and North America would be merged. This would even help with the Feast population being divided even further.