6. CD/USB Media Copying
As you'll find after perusing any PS4-specific forum for a few seconds, their are quite a few features the PS3 had, that Sony then removed from their new-gen baby. They did eventually budge and eventually allow for USB streaming, but unless you want a dongle sticking out your console every time you want to back a game with a custom soundtrack, it's not a great solution. Instead, rather than the USB app popping up when you insert the stick, fans have been demanding the ability to create a proper library function to build custom soundtracks that can then effortlessly be started from the Home menu. The 360 and PS3 had this functionality after a few updates, and it's maddening the PS4 didn't start with it.