Hopefully most of the issues will be fixed by launch.
Fixed it for you.
I have trust in Blizz to get it right too... but what happens when they inevitably sell more then they were expecting and have server issues on launch day anyway?
Happens to everyone.
Predicting the game gets delayed even longer to ensure server stability at launch.
I don't understand why they can't just be happy with authenticate at start up and then play offline... gotta be less stress on the servers and you don't need to worry about being booted out of your single player game.