I played for about 8 to 9 hours on late Saturday/early Sunday morning. I had one instance where I was doing a public dungeon in Summerset, and all the players and monsters stopped moving. My whole game basically disconnected, but I didn't get booted back to the login screen on my end. I manually logged off after 30 seconds of nothing happening, and was able to re-log exactly to where my character seemed to disconnect at.

Aside from that one instance, most of my solo grind seemed fine. I did do a few dungeons the previous day, and noticed that at least one of every party had some kind of issue connecting or loading into the instance. As for my latency, it was fairly consistent at 110ms (which is unfortunately normal...). It seems like my issues are triggered primarily by group content on NA. I'm not sure about EU, as I have never played on that server.

I can confirm it. Some ping problem with NA server. Latency is 300+, 500+ and over 999+

VPN helped me through Germany

So it appears that this issue really isn't limited to a single user and is widespread enough to safely assume that this is a problem on ZOS' end. Since I started this thread (3 months ago), there has been absolutely no improvemen. If ZOS staff could at the very least acknowledge there's a problem and that they MAY have started looking at it rather than feeding us condescending scripted answers, that would be great.

Lag/latency, FPS drops are not really impact your game when you go full solo... but in trials and PvP the performances... are awful :'(

Ever since Greymoor I can't parse or do any combat without my frames dropping to zero. I've done everything they suggest and even reinstalled the game. I've been playing since the beginning but this might be the end for me, can't pay a subscription fee for a game I can no longer play.