Like the blue flash, big deal, yeah it looks bad, but whats worse is trying to do something simple like change the display brightness for the tablet. That requires you to go to the desktop, control panel, and power settings.
Something like that is a huge failing grade.
Or how about how the RT version is running a full windows system, that just has a whitelist of applications that can run in the desktop. The full version just removes the whitelist, and charges twice as much money for it.
But no, they were more worried about the kerning in the Start font, so they added a custom font for that. But wait, don't fonts slow down Windows. They should have just used a vector image.

And why can't the start menu search differentiate between metro and non metro items?
DPI settings, printers, you have to guess which to click, one takes you to the right place, and the other to a useless Metro location.

Did they even consider what people use desktops for? Probably not facebook. Why on earth would I want tiles that update from facebook, or show current bing searches. If they wanted tiles to be useful, make it so win32 apps can update tiles. Then devs could use them in legacy programs more easily.