Also, maybe this is too much but in the pan area you could also have a horizontal phase correlation meter that shows whether a stereo signal would cancel itself in mono (left of meter), is completely mono (middle of meter) or that the left and right signals are completely different and have no correlation (far right of meter).
They are super useful, especially for media that maybe played back on mono devices like phone speakers.
Here's an example
http://www.adt-audio.com/ProAudio/To...TM265_1024.jpg