When you have a long list of files in a folder then it can be a bit painful to navigate to one some\ way down the list by repeated pressing of the Down button. How about using the Left/Right buttons as Page back/Page Forward when such a list is displayed? At the moment they have no function at that point so one would not be losing any existing functionality.
I wholeheartedly agree with you - we definitely need some better organization/browsing options.
Up to this point the overwhelming focus has been on developing the core player to actually play the stuff you want to see, however as the player feature set beings to round out we’ll be shifting our focus and working to improve the look and feel of the UI.
Some aspects of this phase are already underway, so rest assured you will be seeing a lot more eye candy in the coming weeks.