I urge everyone to write a ticket to SE outlining the issue. We have to inundate them with as much information as we can, the more the better.

I've already cancelled my subscription renewal until I know that they are working on the issue. That may sound harsh, but I main a tank, and I cannot tank properly with these insane lag spikes. It makes the game suck for me and the other 3-7 people I'm playing with.