After the update, ESO was running perfectly fine, no problems. I log out for a bit, log back in, at 13fps on the menu screen. Okay, no cause for worry there as sometimes the game just lags at random for a moment, I get into the game. at 12-14fps in Stormhold, where I was getting about 50-60fps barely 30 minutes prior.
Setup
Asus Factory OC'd 750ti
Gigabyte Z68x-UD7-B3 Motherboard
HyperX 16GB 1866mhz CL10 RAM
Stock i7-2600k cpu
Graphics I was playing at prior to the massive FPS loss> High, shadows medium, Below 1080p resolution.
Changed to minimum settings with high sub-sample, 25-35fps. What the hell?