Editing Paintings: How Do You Know You Are Done?

 A couple of weeks ago I was satisfied with this painting; then I took it to the monthly critique meeting and got some good ideas on how the improve it.

Where's the Revolution 1 Acrylic 30x30

Here is what I hope is the final version of the painting. As you you can see I modified the shape of the swoosh through their heads.

Where's the Revolution v2 Acrylic on Canvas 30x30

Let me know what you think of the change