This surprises me. The store is pretty clearly for Metro only, in part to avoid all the talk of "MSFT will end side-loading!" There's been plenty of fear-mongering here about that, but if it wasn't Metro-only that would have been even more out of control.
I'll agree with everything else you're saying. The poor reaction to the multi-monitor is the main reason I haven't tried it out, and everything else you're mentioning is pretty valid complaint. They clearly shoe-horned the Tablet side to try to jumpstart the ecosystem, at the expense of the desktop experience.