He has personal relationships with everyone at the top going back for decades. He doesn't strike me as the sort of guy who will burn bridges or hang out the family dirty laundry. And make no mistake, at his level, that's a family. I wouldn't hold my breath on a tell-all from him since he doesn't need the money or the notoriety. And I don't think his exit was the sort of thing where he feels betrayed by anyone.
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Good post. Agree pretty much completely. Hearthstone, whether you play it or not, has been very nearly perfect from the very first and from what I've seen of Heroes of the Storm there's not too much to worry about there either.