Hello,
All EU servers got merged with NA servers more than 3 months ago, when Mail.ru/My.com B.V. get the game back from gPotato/Webzen.
There is now 2 servers :
-
New Frontier is the historical F2P server, with an ingame Cash Shop.
-
Smugglers Paradise is a relatively new server (october 2013) with a subscription (1000 cristals/30 days), and it is free since 3 months now, until my.com add some new payment methods. You'll find all infos about this server
here.
Population on F2P server is fine, population on P2P server is a little low at the moment, but some new players arrive (or come back) from time to time.
If you haven't done it yet, you'll have to transfer your old Allods' gPotato/Webzen account to a new My.Com account in order to get you characters back. It may take a while, as it requires sending a request to Customer Support :
http://support.my.com/games/kbPage/54?code=en_US
Welcome back, have fun

.