I really miss the option to unsharpen certain objects with the camera lens. For example: you see a closeup of a talking character who stands in front of some objects, let's say a wall. Since that wall is not important in that shot, you want to have the focus on the character only, hence you need to set a blur effect on the wall.
It would be awesome to have that feature, and even more awesome if you could keyframe it. I'm really wondering why nobody asks for this, since thats something you need for almost any kind of movie.