Maintenance for the week of June 17:
• PC/Mac: NA and EU megaservers for patch maintenance – June 17, 4:00AM EDT (8:00 UTC) – 8:00AM EDT (12:00 UTC)
• ESO Store and Account System for maintenance – June 17, 10:00AM EDT (14:00 UTC) – 12:00PM EDT (16:00 UTC)
• Xbox One: NA and EU megaservers for patch maintenance – June 19, 6:00AM EDT (10:00 UTC) – 10:00AM EDT (14:00 UTC)
• PlayStation®4: NA and EU megaservers for patch maintenance – June 19, 6:00AM EDT (10:00 UTC) – 12:00PM EDT (16:00 UTC)
So far, I had a quite stable and more fluid experience with 1.6.5. Overall FPS actually seems to have increased for me.
But so much depends on where that experience is made in-game. Quickly jumping around in-between areas with a lot of player activity soon leads to memory-related problems. There are a few, but effective ways to alleviate them:
Disable any and all addons, especially if they're not yet updated for the new version. Addons which haven't been brought up to par always were a reliable source of trouble in the past.
Set texture quality to medium or less, view distance to below 40.
When in doubt, start with a low overall graphics quality and tune individual settings up from there, rather than the other way round.
Tried the repair option last night, so we'll see how that works.
It's possible that ESO's lack of dual-processor support (that's processor, not core) is to blame. But its worth noting that prior to the patch, the game ran smoothly on my Mac Pro for hours, at high graphics settings.