I know I'm stating the obvious, but the Start Button is not a Start Menu, but a link to Modern start screen.
In essence M$ have replaced the traditional alpha numeric Start Menu with a full screen tile menu.
Those who use the Modern start screen have more options in Win8.1 than in W8.
However, those who have no use for apps in Modern start screen, and no desire to ever go there, are not offered any option to use a traditional Start button/Orb which opens an alpha numeric, cascaded start menu. And that's what all the fuss is about.
IMHO the Win7 Start Orb/Menu had evolved to the ultimate efficiency with search function, jump start, every program/app concisely stored in a few square inches and links to AppData, Favorites, Contacts, etc ... as well as Computer, Control Panel, etc.
M$ could so easily provide such a classic Start Orb/Alpha Numeric menu, to give traditional desk top users this option. But they point blank refuse. Which is tantamount to saying: "Yes, we'll give you heaps of options to modify the Modern Start Screen, but if you want to modify the desktop to get a legacy start menu .... well go buy third party apps! And, oh, by the way, most of them that you paid for will not work on Win8.1.
Thanks a bunch M$! That's really showing care for your legion of past desktop users.
It will be interesting to see how many past M$ fans will be pushed into Mac/Linux, etc ... by this attitude of "Our way or the highway!"