The only reason I can see why they don't make it free for NA/JP -> EU is the potential volume of people. This way, you can potentially have people from 5 data centers move to one. The other way, you get people from one data center getting dispatched to 5 others. Of course they could only give the free transfer to people with EU currencies on mogstation and/or IP geolocalized to Europe (not errorproof but in the rare instance this is wrong you can always appeal).

I'm on Hyperion because when given the choice to go to the data center recommended to EU, I've ping'd/traceroute'd all the servers and found out they were all in Montréal. I stayed on an NA server because of the linkshell/friends I've played with since early access of 1.0 in 2010. Of course, I'd like to be offered a free transfer to take advantage of the lower latency.

I don't quite understand why some people are so hostile/vocal towards this request.