Status of WoW patch 3.1

Despite daily rolling restarts, and even some restarts in the evenings, various servers continue to be somewhat unstable. And by unstable I mean instances crashing of be extremely laggy, or realms crashing unexpectedly. I was just on my Death Knight doing Argent Tournement dailies and Kargath crashed. And it had a rolling restart earlier this morning. Instability--to one extent or another--is nothing new with patches. Especially major patches like 3.1, but it doesn't erase the frustration one feels while you wait for Blizzard to optimize things.