I'm not playing yet but looking to start on the P2P server with 7.0 after I work out which I care about more race or class because I love the Arisen but want to play an Engineer and I can't be both
Make sure you take into account that Engineer now and Engineer in 7.0 are two entirely different classes with different roles.
Once the information about how each class is re-designed becomes widely known (that is - even to people who didn't think finding out from Russian sources was worth it), I expect some players to entirely abandon their current classes for others.
For that purpose, on the Russian version everyone who bought Collector's Edition got a 7-day Creator's Core Morpher or whatever it's called here. The one allowing to change to any class unlimited number of times. Even on the subscription server.