Reason I picked NA was because I was "told" by people on enmasse forums that Frogster had censored the game, removed blood, would have delayed patches, would have a smaller population and that Frogster was a horrible publisher who had ruined other games.
It seems, however, that all of the 100s of people that were jumping on this bandwagon - me including - were categorically wrong on pretty much all accounts.
There IS blood in the EU version, as I can see from the streams now on Twitch.tv, and the violence effects are no different. They are also removing the PEGI-12 rating in the future and there are the same number of servers as US now, indicating a good population level.
So, all the reasons I was 'tricked' (haha) into buying the NA version for, by the kind people on the NA TERA forums, and a few on the EU TERA forums, are no longer real issues. I can no longer see a reason to stay on my NA account other than it would be a waste of $50 if I didn't; however, to be fair, I don't care about the monetary loss and would rather have a much better connection quality to the EU servers, especially now that the game rating is being adjusted.