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.)
All of these specific UI issues result from this impedance mismatch between tablet and desktop UIs. So yes, Microsoft may iron out the specific bugs we bring up. It won't matter, though, because UI issues of this nature will crop up at every seam between the desktop and tablet interfaces. What will happen is that Microsoft will patch these piecemeal and we'll end up with layers and layers of band-aids trying to compensate for a fundamentally broken design.