Non-rendering NPCs & players/slow to render NPCs & players on the 32-bit client.
Audio cutting in and out in the 32-bit client, doesn't matter if the area is "busy" or not.
Map zoom bug is back in both the 32 and 64-bit clients: Right mouse button is failing to zoom out to the world map, zoom bar in the bottom right of the map screen appears/vanishes at random, none of the old tricks to fix the zoom work. This makes fast travel between zones impossible. (No mimimap addon is used/enabled, so inb4 hurr durr disable addons).
FPS drops are getting out of control inside of cities or areas with many torches that cause light reflection from objects. Rendering settings do not seem to matter, and this type of performance is happening on my MSI Twin Frozr 750 GTX Ti and my wife's Asus 980 GTX Ti. We've both tested even turning all settings down to as low as they can go and this still happens.
Ping rates are also out of control - hovering at 100+ ping on a 60MB/60MB synchronous internet connection with spikes to 200 at times is....odd, especially since it only happens in ESO.