Your text is BLEGH, not liking it at all. Flow wise, he's also right. It's basically the "direction" the signature is going in. You need to make it more obvious that the flow is vertical, up to down. You also may want to experiment with the lighting effects a bit, crop it majorly, and throw off the focal to either side.
Blegh... The blue of the spartan contradicts the red bg and flame too much... I'd say work on the color scheme a bit, definitely improve the overall flow, and for christs sake do something with the text...