I love the idea: I would have done without the reflected second diagonal and had the white running shoes at the bottom of the frame...little people far away tend to lose the drama in a picture for me...IMO anyway :)
Very Paris-atmospheric, although the diagonal lines of the glass pyramid are more incidental background than "a diagonal axis as the major compositional thrust of your image". Never mind, Henri Cartier-Bresson lives! 8
I'd suggest cropping this to exclude all of the foreground below the running figure's shadow and then above from the top of the archways (ie, level with the vertex of the diamonds), then to also exclude all of the poles & ropes to the right of the standing jacket wearer. I like the figure running from the jacketed individual to the group on the left. He is a nice action point when everyone else is standing around. Also the effect of the diagonal glass supports being reflected as vertical lines is well captured.