I agree with this. The Dock was one of the key reasons for me why I switched to OS X. I dont want to trade it for a task bar like Windows has, not even the one of Windows 7/8 (which is already a bit more Dock-like).
With respect to window maximising or snapping, I agree. This is something OS X should provide natively. Since Yosemite replaces the green maximise button with the fullscreen button, desktop users are left with a workaround. They should show some more love to desktop users. Whenever I see super-simple apps like SizeUp/Window Magnet/Cinch or PopClip, I always think that Apple somehow failed to anticipate these. The attention to detail is something I always found very charming about OS X.
As for the rest, there are no system-wide things I acutely miss. But I do think that Apple lost its focus on some of its core apps. I would like to see Apple really focussing on the core aspects of OS X next time, i.e. fixing bugs and extending features where they make sense.
Just to mention a few:
- Finder has too many glitches and has become less wieldy. Id love to use the tabs, but their implementation is just so poorly thought out. I wish the feature would behave like tabs in Safari (i.e. open everything in a tab instead of a window), like you would expect. I also dislike that the window/sidebar/columns are sometimes resized for no apparent reason. It just feels very buggy sometimes.
- Notification Centre is currently neither useful nor avoidable. I rarely check it due to lack of some kind of visual indicator that shows me whether I have unread messages. It doesnt seem to be addressed in Yosemite. Currently, I almost never open it and use the Dock for everything. I also turned important messages into dismissible notifications (the ones you have to click on to dismiss). With all the new features in Yosemite, I still dont think that I will ever care about NC this way. How can Apple not see this?
- iTunes. There is just too much wrong with this app, I dont want to get into it.