[Shnipah]

Basti

Can players still access the U.S. servers?

Under the new partnership between SOE and ProSiebenSat.1 Games, European players of the above mentioned SOE games will be able to play via ProSiebenSat.1 Games's service and will not have access to U.S. servers. However, existing EverQuest II players in Europe that have played on U.S. servers before the transition will be allowed to continue playing on those servers through their SOE accounts.

Can U.S. players log on to the European servers?

U.S.-based players will have access to the U.S. servers only.

That very much too me suggests you will be region locked.