I agree there are some core apps that have been neglected but overall usability in OSX in my opinion is still far better than the alternatives. The biggest issu

I agree there are some core apps that have been neglected but overall usability in OSX in my opinion is still far better than the alternatives. The biggest issue seems to be that some applications have matured well beyond their original GUI so as new features have been added some of the simplicity has been lost. My guess is many of the core apps (Mail, iCal, iTunes, etc) will end up looking a lot more like their iOS equivalents.