Sooo I heard to solve the lagging problem in pvp ZOS has done these:
1.Poor deers and fireflies are slaughtered
2.No more collectible animation
3.Temperaily shut down cp

I don't know about the rest but except for trueflame, all other camps are fine, and for Trueflame it is also not that bad when there are not many ppl around
(I have a good setting laptop and i can run max graphic on all campaigns)

EXCEPT when there are zerg around. Zerging is the top reason why pvp is lagging when there is battle, almost all other problems can be solve by lower your graphic setting

Note that I am not against zerging on game play wise, it should still be an effecitive way to push emp, take scrolls and such, but for the lagging zerg need to be nerf down.

Reducing the AP gain is a good way to make ppl less likely to participate zerging, simply spread the AP gain of capture resource when many ppl around, and say only give the top3 damage dealer major AP when one is killed