[pdeuchler]

If you go to the Apple Developer forums (https://developer.apple.com/devforums/ Dev account needed) the "Getting Started" sub-forum is filled with devs, from just signed up to veterans with multiple apps under their belt, asking usability questions.

I think it's telling when your own developing base has to post to forums asking simple questions like:

  Where did my spotlight search go?
  How do I rate songs?

[threeseed]

Yes. It's almost like this is a beta version of the biggest ever change to the OS and some people will have to learn new ways of doing the same tasks.

The only thing 'telling' is that somehow you're surprised by this.

[daughart]

This is not encouraging... Hopefully they can resolve many of the usability issues before release.

For me usability is probably the best way to substantiate a design criticism.