Honestly as a NA player on an EU server, (I joined it on a recommendation), I was concerned about the prospect of an EU datacenter because I have satellite internet, (the only thing I can get where I live with a download speed faster than 5mbs, I currently average between 15-20mbs download speed with this internet though,) which due to the way such works I already have a natural .7 second lag/ping time. Because of this I have almost a full second less to dodge AoEs than other players, which results in me taking a lot of damage from attacks that already have short dodge windows. The prospect of adding more lag onto that had me concerned initially. But, apparently also because of how satellite internet works, I have the same ping no matter which server I connect to, as after doing some ping testing with the JP servers, I found it to be the same as when I ping the servers based in the US. Not really relevant to anyone who doesn't also use satellite internet, but it does bring up the concern about what will happen to all the current NA players on the EU servers who joined them because there wasn't any difference between the two sets?