I agree with Awson - but i'd rather say that the torso only [i]seems[/i] to long, while the real problem are the stiff shoulders, raised too high and aligned on a strictly horizontal line, despite one arm being raised and the other - lowered. I'd give them at least a bit of a slant, if not try to loosen them up somehow. Though i guess it's mostly the fault of the shoulder pads - they add additional volume, making the body look slightly disproportionate.

As for making the pose more dynamic, you could twist the torso a little bit more, in either way. Turn her so that her chest faces the viewer, and you can juxtapose the 3/4 view of the leg with the en face of the torso; turn her left side close, and she'll be shoving the severed head in your face, which makes it a bit more aggressive.

Don't listen too me too much though, as i am a complete amateur. I've just had my share of drawing people, so i thought i'd throw my two cents in. :P