Just an idea. It would be great to use special utility to compress games like archive right from console. It's almost 50% economy of free space on HDD.
At first, you do not need to delete and redownload game later. Sometimes it's hard to take decision what to do with the game when you finished it and game was pretty good.
At Second, it's saving free space on HDD that allows to download more games.
Should we expect smth like that in the future?