The Start menu in Windows (and the placement of the Windows key) always seemed to be one of the clunkiest and slowest to use UI components out there, watching many Linux distros try to mimic it to woo Windows users is silly. No OS is perfect, even Apple's highly touted OS X has had eight revisions of trying to get the Finder right and it is still a work in progress. Windows 8 to me feels like a break from the tiny incremental UI tweaks Microsoft is normally known for, I welcome the change in attitude with the somewhat radical design and feel departure but not the tablet-centric nature of navigating the Metro based sections of the OS. It works okay with my Wacom USB tablet on my desktop but on my laptop it is a real pain to use with an older non-multi gesture aware trackpad, that machine will stay with Windows 7 till it dies.
I am sure the teams at Microsoft have been told what is wrong with Windows 8 on the desktop and will be patching it eventually. I am hoping it gets fixed sooner than later