PS.I will suggest adding an EU server when the Beta phase ends.
The GMs constantly make mistakes which leaves items of power and/or significance in players hands and sometimes the players get punished or are scared of punishment of the GMs mistake and sometimes the players get away with it which is bad for the health of the server.
Ping from EU isn't that bad.
Do you think that opening EU server is going to change Staff? Do they miraculously get out of bed on the "right" side and change their bad behaviour towards changes etc?
Let people explore nearly whole content, GM fix the problem with players/mechanics and then i think it is time for EU server, it isn't good time to open it right now