Culture clash is a silly concern on the basis that we've already clashed: during the cloud DC test, when hunting on Materia (JP/NA/EU all were fighting S ranks together literally), OCE have played on JP for years, and people make alts in eachother's regions (English players in JP, JP players on NA, and EU<>NA has always been a common crossover).

As you said, it'd be rare to do it anyway due to ping, unless crossing over was of benefit to ping or meeting a friend anyway.

SE responds better to a giant post with lots of pages, so the one we've been adding our voices to is: https://forum.square-enix.com/ffxiv/...-and-EU-Travel