Thanks for reporting this, I thought it was only my problem.
I have noticed a significant slowdown as well. The game takes 5+ minutes to load all the graphics resources, even after I have successfully logged in. After everything has loaded, it plays with a normal framerate for me, but very laggy. Skills take more than the specified time to finish cooldown. Mobs appear to die a few seconds after I have use the skill that killed them. I am now playing from memory rather than responding to what I see on the screen.
You did have to say europe servers
we have been fighting this issue since LR opened and we have changed the servers a number of times. The problem is not happening at the servers, its happening with the connections when there is very heavy traffic flow mostly in europe and its because their traffic flow is more than the connections can handle.
do not be fooled here, your net connection speed is not a measure of how fast your net speed and its not easy to see how heavy the traffic flow is, most people use speed test, thats simply a test between the player and the isp, but most connection lag helps between the isp and the servers.....
now a very quick and simple test, is to use a VPN to divert the traffic flow, use the US as a channel and see if that makes a difference. It often will and all its doing is making the connection take a different route to the server....
the servers send the information directly to players because its the fastest option for us, but a VPN will mean that your connection is suddenly using a different route and how that can spend things up, is that the VPN route could be lighter in traffic than the main truck lines, so its actually faster.....