From what I've read, the NSA is only spying/eavesdropping on those outside of the US - something about the Constitution (or Bill of Rights?) making it illegal to spy on their own?
Trust me, they have been doing it to us also and for quite some time
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Anyway, regarding Mavericks. I tried it on my Air and as soon as I realized that SyncServices had been removed/disabled and I could no longer sync my iOS devices locally I went back to Mountain Lion 10.8.5 as quick as I could. I then emailed Apple and told them what I thought about not being able to sync locally.
I hope they return local sync to Mavericks because although I did not have it on my computer very long I did like it. Of course I did not use it long enough to have the issues that are being reported so I might feel different if I was using it on a daily basis.
So between the lack of local sync and the issues being reported, I don't plan on going back to Mavericks anytime soon.
Regarding the possibility of the look of OSX becoming like iOS 7
NO, NO, NO!
If I wanted a computer that looked like a kids toy I'm sure I could find one at Toy's 'R' Us
(No offense to those that like the new look. It's just not for me).
I was a die hard Windows user ever since Windows first appeared (DOS before that) and I finally had enough of the constant updates, crashes, OS reinstalls, etc... So I switched to Mac in 2011 and have never looked back (once I got over the learning curve).
I like how my Mac looks and runs. It does what I expect and rarely acts up. I like icons that look like the program I'm about to run and buttons that look like buttons. If Apple goes with the flat buttonless look for OSX (or what ever it's called at the time) I don't know what I'll do because I do not want to go back to Windows.
Jon