To be fair, several of your complaints are really polish. This isn't the RTM by any stretch, and from what I understand, the reason for even having the consumer preview is to get feedback like that. Saying it's doomed because of some of these things isn't really fair.

I'm not sure about the mouse-tablet thing, in general, sure. But the specific way you use the lock screen, for example, is likely to get fixed before they release.

(I've been using the Consumer Preview for about a week on my primary machine and I'm pretty happy with it.)