I think a great feature would be one that removes items of choice, from the right click context menu, loads of junk in there a lot of time after installing software, would be nice to have this feature.
I personally would not think this would suit ccleaner. Simply as its on the registry side & not so much as 'junk' as you call it.. A decent uninstaller like 'your uninstaller' will pick up these left over registry entrys after uninstallation of the software.