I predicted something like this would happen actually. For one, it's a huge change to the game that's been moved to another shard with more ppl trying to log on at once or even at the same exact time.
Yes, I'm sure it'll fix it's self in that respects but they might need to tweak a few things on their end to, taking the server down might be wiser. Check for xtra errors, minor glitches or other unforscene things.
I've been around since s.t.o. launched and just like a previously posted guide there's always a "zerg rush" to be the first on to try the new features. take in the basic (and flawed) behavior of a consumer/customer who wants instant satisfaction guaranteed and multiply the head count somewhere in the multi-million range only equates out to the hardware/software being pressed beyond its capacity and the technical experts scrambling in overtime work hours to either fix the situation or in worst case situations replace/expand the whole rig.
from what minor experience I've got in that specialty of work I can say its usually a contest between (A) what the company executives want done. (B) what the network/systems department is asking for to achieve their corporate superiors objectives. (C) what the higher management is willing to provide while striking a balance between being as cheap and profitable as possible. then finally (D) what the shareholders believe they should get out of it.
one thing I know for certain is its an extreme nightmare when your job is revolving around the 24 hours maintenance and repair of multiple 8-10 foot tall racks filled with various routers, switches, server units(sometimes bladed) and other top of the line hardware that can total up to a few million dollars per location. this isn't even going into the customized software environments requiring hundreds of various licenses to be activated.
self educated on basic computer maintenance and repair, studying towards systems security. also assistant to family friend who is in charge of a network spread across the U.S west coast. all in all.. yes I agree people need to get off pwe/cryptic. this repeated scenario of every season having a catastrophic issue is to be expected when you really get into the play between the desires of the company vs what the environment can handle.