She looks off-balance, like she might tip over backward if someone poked her in the chest. I think it mainly has to do with the hips almost being infront of the head, I'd try shift the hips back a bit.
I agree with the statements about her right arm looking short. Elbow should be lower, I think.
Shoulders seem a bit narrow. Legs seem short or crotch too low. That coupled with the large head makes her look childlike, which clashes with the exaggerated boob-bounce.
I also agree a bit of bounce to the arm holding to torch will really help the sense of weight and motion.
A more general crit is "character". Not really getting any sense of her feelings about what she is doing. She's just kind of blank expression with a standard kind of walk. The open hand implies she is tense, but the face looks almost bored and the walk is kind of hum-drum, like a kind of "damn circuit-breaker has clicked off again..." situation. I say either relax the hand, or tense the walk and face.
Those are the main things I can see at this stage
