Hey we like your designs but we have decided to ditch the superscript "4". Could you take the 4 out of superscript and perhaps use color instead to accent it.
I like the design but is it out there already? Not sure, just looks familiar. Can you change the colors so all 4 are distinct and brighten the "light" in the middle? It looks like people w/their arms raised....is that the idea? Has good symmetry.
Probably any design with four figures in a circle is going to look familiar, but I made this one up! They are supposed to represent human figures, you are right. I will try some other effects with color and light.