Metro makes no choices because it has been caught in the middle of Microsoft's "identity crisis": is it a touch/tablet interface or a desktop/mouse one? Microsoft is failing to make those hard choices and thus Metro is a reflection of it.

Furthermore, the lack of differentiation between apps is a bad decision in my opinion. It's hard to figure out which app/feature you're using without reading the titles/headers… I don't know about you but that doesn't seem like a good choice in an interface for a desktop/multi-tasking device. Again, Metro is being developed without a clear identity, hence my opinion.

But yes: it is my opinion and yes, you may disagree. Opinions are subjective. :)