If you paid attention even slightly, you would realise that ZOS have mentioned this almost every single ESO live and there's a mega thread on PVP.
When the problem is deeply embedded in the game's code and engines, things aren't a matter of waving a magical wand and it's fixed.
Saying that I rarely get lag even in PVP. The 64 bit client should help alleviate some of the stuttering and problems. But also make sure you're not trying to run the game on a potato.
Should a fix be a priority? Sure should be. Is throwing tantrums the way to get what you want? Negative.