Well the hardware upgrade for Ravencrest has been installed and thanks Blizzard, there is no more lag. Or wait, the instant disconnects prevent us from even being able to experience lag. To be honest we hoped for a better solution 😉
Edit: at 21:45 the Server was back up. I just wonder why Blizzard will not offer us a move to a less crowded server. But well since they actually can earn cash with payed char transfer this will probbaly not be seen again.