The low readability/contrast in some places seems to be the main problem.
Sad to see the old Finder logo go – the central curve ending outside the "box" was a nice touch.
The new dock reminded me of the old Powerbook G4 I had, with 10.2 installed. I still somewhat miss the whole "Aqua" interface sometimes – but maybe that's just nostalgia or I over the years it's become harder to surprise me with UI design.