Just try and take keeps in Thorn (EP) buff campaign, within in minutes you can't move. Now Chill is pretty much the same, so now both campaign's are basicly broken.
As soon as certain pvp guilds go into a campaign the lag waves start, when they leave all is good.
I played on Haderus and Azura Star for months and no lag freeze's, now there is lag, again its when certain guilds come into campaign to control.
Somehow ZOS needs to either stop the easy entry into campaign's (travel to) or just give up.