I´ve had severe issues with lag/extremely high ping on live since latest ptc (not that they have anything to do with eachother, just to give you a hint on how long the issues been noticable). PC EU.
The game has been unplayable other than to farm mats... constant dc's and rubber banding also. I am running a pretty constant 50+mb download 15mb upload. No other games are lagging. And I can stream 4k video no problem. I am about to cancel mine and my gf's ESO+ and move on to a different game...