wow... not a level of art I can criticize. Within the given style, I'm not sure how one can better express motion and gesture. Images already look dynamic and full of life.
hmm, I don't think the outline is bad as it is but if I were to try and criticize, I think the feel of the depth is a bit lacking compared to that of the photo. If it were me, I'd try to draw the same pose but with a more distorted lense and see if the expression you want is enforced. Other than that, the orientation of the hip seems a bit slanted towards the viewer making the pose more twisted than it really is. Perhaps that's what is making the image look a bit flat.
I think you have good eye, meaning you know when a drawing is good or bad. This is a great skill, but don't let this cheat you away from a good drawing. Observing from the repetitive overlapping outlines, I worry that your drawing strategy is to draw until it looks good. This means less consciousness on the lines you are making and letting randomness take over. My humble advice is to try to observe your lines as you are making them and keep 1~2 lines only for outlines.
