I actually think OSX and especially some of the Apple apps like FCPX have a bunch of discoverability problems

there's a lot of cases where you have to hold down alt (option) to reveal the 'secret' menu options or special tool mode or where double-clicking on something provides a feature not surfaced in the right-click menu etc etc

it seems someone has gone through the interface and tried to sweep away visual clutter, effecting a superficial subjective improvement while harming discoverability and thus usability