I think that says more about your Windows usage than Vista. Its been a Windows convention to use "Alt" to reveal (even hidden) menu options since about Win95. Otherwise, the way to show file extensions is identical to 98 in Vista.
Also, I don't know what crazy universe you are living in, but in the control panel, "navigate up to the previous menu" is the same as the rest of the operating system — click the parent on the address bar. Very simple.
You, and people like you, just are bashing Vista because you hate change, and not really any other good reason. Its damn painful to go back to XP, because its so much less productive and so much harder to find things. Besides, everyone at /. is supposed to be a nerd, but apparently the addition of more keyboard shortcuts in both Vista and 7 is easily overlooked because RAWR IT'S M$.