In simplest terms: If you have your WotB expiring and your Rage pool depleted, and attempt to Whirlwind, you will get a Network Disconnect. I cannot opine any further than to clearly elaborate that I am on a 50MB/s Fiber Optic connection in which I have never, for three consecutive years, had a disconnect from a game. This only is occurring every ten-or-so minutes since 1.0.5 completed.
If anybody has had Network Disconnects recently, and knows for a fact that they do not have a network issue (FYI, I have Twitch.tv open mostly livestreaming gamers in 720p+/1080p+ all the time, and when I get my Network Disconnect error message, the video feed is uninterrupted, which further confirms it has nothing to do on my bandwidth limits), then please post / let me know.
It's absolutely unplayable right now. Constant disconnects due to WW, or some underlying bug within Barbarians.