Didn't read all of it (and hope Chris didn't violate NDA), but it seems to confirm my initial suspicion that Avellone left Obsidian not because of Sawyer (as some Codexers thought), but because of Urquhart. Which was more logical - usually you leave your job not because of a colleague you dislike (there are always some jerks around), but because you have problems with you boss (this is what I did several times, before I've found my current job). Feargus being not a very good manager also isn't a big surprise and it explains a lot about Obsidian games being a mess of cool, but poorly implemented, ideas.
What I very much dislike, is that Chris is still dwelling on this. Maybe after he finally talked about it in public, he will feel better and can concentrate on something constructive (like Bao-Dur, who wanted to design planetary shields after working on a bomb). The best way to deal with a big failure in life, is to create something good. If you are a writer, write a book. If you a game developer, make a game.