I think they thought of putting in a more sales-oriented person (Johnson) who talks to customers all the time and really knows what they're asking for.
There are some folks who have been there for a long time and who will resent the way things are being run as a bureaucracy. And maybe they were there for the big stock run-up and they're seeing the stock not move now.
Realizing it will take a while to get these documents where the EC wants them, Microsoft decided to buy a little bit of time by releasing the source code while it continues to work on the documentation. I think they are going to have to continue improving that documentation.
Honestly, I'm having a hard time envisioning where this product will fit into consumers' lives. It occupies an awkward position between single-function handheld devices and laptops. I'm not sure a market exists here.
It looks like it's another effort to popularize the tablet PC, this time in a smaller form factor.