People will gladly learn a new interface if its conventions appear well thought-out and add significantly to productivity. Win8's interface does not appear to satisfy either need - to some degree as a tablet interface it does, but then you're left with the hundreds of millions of PC's where a touchscreen makes little sense, and where Win8's interface changes are a regression in many areas.
Wait, if things are unintuitive and poorly thought out then they're unintuitive and poorly thought out on a tablet interface, too.
But there are plenty of ways Win8 is better on a Desktop too, the less easily discoverable aspects you're talking about aside. The problem with reviews like this isn't that they don't have a valid perspective, but they're simply not fair and balanced reviews.
Plenty of people enjoy Win8 on a day-to-day basis, on a desktop, even if at first they scratched their head about the location of the shutdown/restart options. These people aren't all paid money by Microsoft ; acknowledge that, and we can have a discussion.