I would like to see SSL keep track of the times a tracks has been played and display that. That way it's easy to filter out tracks that you don't play (often) and filter them out of the collection.

Also, I would like to see SSL keep track of the date a file got entered to the collection. I used to display my files on date of entry, while viewing my collection in TFS. So the newest files where allways on top. It would also be of great help if you could change the date of entry, from within SSL. I often ripped tracks from vinyl and after a while I got hold of digital variants. I would then delete the vinyl rip and replace it with the new (digital) file. I then changed the date of entry so it wouldn't appear like a new entry but just like a replacement.