I agree that there is plenty of life left in that clutch disk. But, since it is already apart, I would replace it. The flywheel and pressure plate look like new. Why take it apart again some day? What is, some day, those pucks decide to fly apart?
Plus, more puck area than you would think has already flaked away, reducing the 'flat' area that contacts the flywheel and pressure plate, so that disc will show accelerated wear from here on out since all of the load goes through a reduced surface area.
This is just the way I am, and I would replace it since it is apart.