I think all would be well if everything was more consistent.
There's 3 main bits of Windows 8 as far as I'm concerned;
Start (metro home)
Apps <-- this needs to be easier to find and access
Have a universal toggle button to switch between modes, keep notifications on screen in the same place all the time (battery, wifi, battery etc) and keep common / open apps in a bar on the screen all the time - regardless of the mode (similar to task bar). Certainly don't hide everything - keep some stuff on the screen and make it consistent.
Unfortunately I think I've just described iOS or MacOS. And I'm not even an Apple fanboi.