

Top image is current TVP11, lots of squares in view. 2 squares per instance. If you have many layers you'll quickly have your screen filled with squares.
Bottom image is a suggestion. It shows the same info, without all the draggable squares. They could simply appear when you move your mouse onto an instance (see 5th instance in the image). Also, removing the color label (colorize the dashed line in the center instead) and thumbnail from empty instances would greatly improve visibility of empty frames.