Near as I can tell, there've been a few realms with stability issues, but uh, buggiest patch ever?
Freaking hardly.
You know Blizzard, and you know that things get taken care of if you give them a little while.
If they take time to work on the servers during playtime, everyone whines. If they take time to work on the servers during realm maintenance, people say that not enough work is being done.
If they halt all content production to work on every bug ever, people bitch. If they halt all bug fixes to work on instances, people bitch. If they work on both at the same time, people bitch.