While Jesus Diaz has a few good points (like the two-finger versus three-finger swipes depending on Launchpad versus Desktop), overall this reads like a bunch of nitpicks.
Yes, Lion does some things differently than Snow Leopard. Yes, some people won’t love all of them. But overall, I think the transition from Snow Leopard to Lion is going to be remarkably seamless for most users. It’s different, but it’s also familiar.
The most different thing is the inverse scrolling, which makes OS X more like iOS and will finally fix my brain when I switch between my devices.
To mention Lion in the same sentence as Vista (which Diaz does in his intro) is ludicrous.
When Diaz complains that Launchpad is “an extra click (or two or three)”, it’s pretty clear that he’s missing the bigger picture. The big move in Lion is the move from the click to the swipe. That is, the move from the mouse to multi-touch. And once you figure that out, it works. Quite beautifully, actually.