I don't see any part of the fine article that is in any way unreasonable or something that could be called a "rant".
MS has a long history of being untrustworthy, especially when it comes to its dealings with Open Source and Free software, to be careful about Codeplex is not entirely ill advised.
I'm sure MS would like everybody to forget all the underhanded and deceitful things it did in past, but people have memories, even if "the consumers" don't.