Can I ask an honest question? How much of this "churn" is due to them feeling their way through this for the first time in public. Privately, we would have never even heard about this.

I've been very critical of them deciding to call RC12 an RC because of the amount of breaking changes that have occurred up through beta (and now even between RC1 and RC2). I am typically met with apologists that tell me it's me who is wrong, despite that fact that the rest of the industry doesn't break their software (typically) between release candidates.

In the end, about two years from now, I suspect that this won't be an issue. I truly don't think there is malicious intent here on the part of Microsoft, I just don't think they put as much planning into this effort as they should have. They are also beginning to alienate their new-found open source followers by making decisions behind closed doors. They really need to be careful here...