I thought it was just me. I see that new kind of colour picker everywhere, and it drives me nuts, because it's one of those sorts of colour adjusters that's great if you know the hex value of the colour you want but not if you don't. And if you knew it you wouldn't need all those weird controls.
You try to dot around the colour block to find what you want. One time you move a little way from where you are and the colour changes dramatically. Another time you move a lot and it makes little difference. And then there's the slider thing on the right. WTF does that do compared to dotting around on the left?
It's as if all the UI designers in the world reached a common agreement to really mess with the heads of non-graphic designers by giving them a tool that was designed to hinder not help.
I agree Mike - the 40 base shades, the hexagon of closer matches, and the lighter / darker slider make a hell of a lot more sense for non graphic designers.
My workaround is simple. I use the eye-dropper tool to sample the colour I want from somewhere else. Crude but effective.