The thing about transfers is that it’s not something they have ever shown to be an implemented feature.
People are assuming it is, but if we look back at iCBT2 when the BR server was made there were 0 transfers.
They had to simply start all over again on Saule, and you can guess how badly that went over.
Transfers are just another black hole of uncertainty for the NA server. Say they get opened and some US / SEA / BR that are on the NA server also jump boat to the fresh new EU server with free transfers because they just simply want another fresh start or a fresh new server to establish guilds / domination etc. a number of reasons.
It could mean an even bigger divide than if we initially just had an EU and NA servers.