Apple is destroying the fantastic Mac OS X interface. Apple should bring back acroll arrowheads and true color labels, for instance.
This. I miss the times (like 10.5) where there were DIE HARD features, for the poweruser, for instance the improved window management back then.
I think 10.5 was more harmonious, pretty, and thought out than 10.9 currently is. It feels much like Win XP back then: loads of features, most of them poorly thought out, lacking options, rendering them unused and or either resulting in installing additional tools that should've been built-in.
For example, Terminal vs iTerm: where's h-split? That would be greatly appreciated. Or build tmux into Terminal in a way that the great functionality of tmux integrates beautifully in Apple's (former to be better IMHO) design strategy.
Apple used to be about having BETTER software with SMARTER features that are EASIER to use compared to Windows. Like transparency alpha images in OS X, Keynote with there awesome smart guides which was new back then compared to powerpoint with only grids, hardware accelerated beautiful effects.
I truly miss the days where I thought with a new OS X release: nice, all this stuff and it's all still UNIX. A win-win situation. But nowadays I am worried about what they will shove in our face, like the completely useless "iOs integration" (IMHO as a poweruser).
Programming, Music creation, Productivity, Design software. For a DESKTOP os improvements should be in terms of Terminal, window management, better finder, better filesystem (HFS looks like NTFS to me compared to BTRFS and EXT4), better package management, an iTunes I would actually want to use (even the font rendering looks off, like Nimbus Sans under KDE back in the 3.x days). Stuff that helps us being more productive as desktop users.
*Sigh*