If I'm interpreting the illustration correctly... General problem I see is that silhouette lacks accurate foreshortening. The arm bones don't appear in the proportions they should because of this. For instance, the fist and the sword are supposed to be closest thing to the observer while elbow is farthest away. Also, the green effect is monotone in its flow across the arm, I think that the parts where sword is should come with stronger highlights than the rest.
Well, my judgement is review posted above. Judging weather this goes to substandard or not isn't particularly a problem for me, all it takes is two clicks. I don't see a reason why not to work on this icon further, but if you don't want to, than okay.