The other day after update, my launcher kept failing to update or repair. Kept getting "Error 1032 - OSError_Locked" with a message about closing the game. Ofc, I didn't have the game open so I retried half a dozen times thinking its just another stupid bug. Finally, I came and searched forum and found this discussion
forums.elderscrollsonline.com/en/discussion/79704/error-1032-oserror-locked
And lo and behold after pulling up task manager, ESO was somehow still running from the night before in my background. Force close. So I finally got updated, fixed the usual firewall error, repaired after 2 immediate crashes and playing.
Until today, when I closed out to check for an add on, rebooted and came back in to extreme lag, lag like I've never experienced. For ***** and giggles I pulled up task manager...oh look! I'm running double, no wonder the insane lag.
So, another thing to check for if all of a sudden you are experiencing crazier lag than ever before, ESO doesn't always shut down, sometimes it just hides
If options weren't necessary, and everyone played the same way, no one would use addons. Fix the UI!