For OSX 10.9 I'd like:
- improve finder file and folder display/management
- unify the behaviour of the 'green button' controls on windows
- improve multi-monitor and spaces (this needs a great deal of attention)
- improve graphics performance/drivers/subsystem by a large 'leap'
- improve the uninstall process for applications
- improve the speed, and how iCloud is integrated by streamlining its usage and making it less 'forcefully known/used' in some of the applications like TextEdit
- remember OSX is a power users OS, and for the love of god don't dumb it down. However, iOS apps and things like notification centre and notes + reminders are useful. Launchpad? Get rid of that crap
- in Notification center, I wouldn't mind being able to use that to add widgets to like weather etc. and get rid of the Dashboard completely