The US servers already experienced something similar back in January and February. Upstream*** lag of several minutes, assuming people were even able to enter siege.
Lost a lot of guildies to other games, during that period. Come to think of it, we are still below the 50/50 threshold of broken or epically-laggy sieges since our server move. Given a couple more weeks, we may finally be over the more working-siege-days, than non-working-seige-days.
I hope your EU server move is less troublesome.
edit: actually, 'upstream' is not correct. the skills/commands got upstream to the server, but we did not see the results for several minutes.
was different , i remember the video
what i experienced 4 hours ago was:
the first 3-5 minutes were okay.
after that basically everything came to a halt (visible, enemy would be visible, but not moving, not attackable etc) , skills would not react. then a massive backport to a location where i had been 30s ago and the game was going on again ... for 10s.
then suddenly our group disbanded (raid view disappeared) as the WHOLE guild disconnected from siege. took us 2 minutes until we could re-enter.. 2minutes later, same again. after the third time we didnt bother to login again because we were fed up with the crap. was a global problem btw.
--
yesterday with the old 200 guild limit it was like it always was (and that was already after the server move) - the usual laggy and bugged crap. the reason for the performance issue is not the server move but clearly the increased limit by 100%. But its explicitly a 2-day test, so i dont expect them to keep it like it is unless they throw double the hardware after the problems or fix the performance issue magically by tomorrow.
Oh btw, usually our 200 guild limit is full 1 or 2 seconds after registrations are possible. today 10pm it took not much more time, probably like 5-10 seconds to fill the 400 limit ... atleast i wasnt able to register an alt-guild anymore already at 22:00:30.
But we have 20 servers competing in siege (DE/ENEU/ES/FR/PL) so thats a much bigger total population across RoM EU.