It's hard to dig the facts out of the machine. I was sitting in a Windows 8/Azure presentation last week and ask the Microsoft presenter several uncomfortable questions that he didn't want to answer. :(
The only serious problem I have with Microsoft, and it is really quite a serious problem, is that you have no idea how committed they are to any of their technologies and once you've been bitten the n'th time, for n >> 0, you just desperately want to be in control of you own stack, and so you own destiny.
Technology wise Azure is quite MS-agnostic, and that's the smartest thing they could have ever done with it. That said, their documentation has move from being developer-friendly to being a collection of marketing-friendly bullet points intended for pointy-haired bosses to inflict on their dev teams.
Still, xradionut, would love to hear the uncomfortable questions you posed. They'd help me decide if there's more than the devil in the lack of architectural details.