There is now more information about Data Center Travel during expansion launch.
EU link:
https://eu.finalfantasyxiv.com/lodes...e9d4042f7e3ea3
NA link:
https://na.finalfantasyxiv.com/lodes...56e40c77a5af8e
TLDR:
- Prepare for long login queues.
- We can move to Dynamis and Shadow DCs but not to any of the older DCs. If you want to play together with friends from different DCs, you all have to move to Dynamis/Shadow to do so.
- Oceania travel will continue as is. People from NA/EU/JP can play together in Oceania but travel to NA/EU/JP is not possible.
- Move your traveling characters from Aether/Primal/Crystal/Light/Chaos to their home world before launch, because your ability to return may be temporarily impeded by periods of server congestion. There is also a mention of travelers having a lower login priority, but I'm unsure if that only applies to JP servers.
- Paying customers get to login before free trial players.
- Players who are afk for 30 minutes will be automatically logged out.
My notes to those planning to travel to Dynamis and Shadow:
- You can't access Island Sanctuary and the Firmament when traveling, so if you want to buy rare dyes (Pearl White, Gunmetal Black, Metallic Brass) for the new dye system, do so before launch.
- Shadow does not have a functioning market board, because no characters can be created in the DC. Buy all essentials from your home world's MB before traveling.
- Empty your inventory, chocobo saddlebag and armoury chest (=gear inventory) before launch and retrieve important items from retainers, because you won't be able to access your retainers or sell items when traveling.