https://www.pcgamer.com/world-of-warcrafts-80-patch-is-kind-of-a-mess-right-now/

Any World of Warcraft veteran will tell you that patch days are usually a bit of a disaster. It's an enormous game, so little things are bound to break here and there any time that Blizzard releases a new patch. But Patch 8.0, which lays the foundation for when Battle for Azeroth launches next month, is in a real bad spot right now, and players aren't happy about it.

Almost immediately after the patch was released, Blizzard confirmed that there were problems with players being able to log in and see their characters—a pretty common and understandable occurrence on a major patch day. Once those issues started to resolve and players got into the game, however, they found loads of problems that Blizzard hasn't—even at the time of writing this post—acknowledged.