The Microsoft conundrum: Every UI, interaction, and functionality must always stay the exact same and never change or be iterated upon/refined, but why aren't they trying anything to meet X demand or Y new thing.

There's plenty of new non-Metro-related functionality in Windows 8 that nobody ever complains about. Especially on the management side of things. Of course, people who'd actually use that functionality don't use Windows 8 because of Metro.