She loses all kinds of volume when she bends down into the attack, almost like she turns into a mini-me.
Also she lacks anticipation before she moves her right hand to strike.
It would read better, I feel, if you gave her some counter-balance, such as putting her left arm out at a diagonal that crosses her torso in the previous frames (to show some overlapping-action) as well as emphasize her knees and legs more (give her hair more volume too).
She's a really tall babe and yet, somehow, she loses all of that when she dips down into the attack. Her front leg and back leg proportions are just waaay off and I feel she should be leaning way farther forward and stepping way farther out than she currently is. Push and exaggerate the figure. Take a look at Street Fighter Alpha 3's animations of Chun-Li -- they push her much farther than the body really can go, but it looks great because there's a lot of "snap" to the body when it pops back into proper proportions.
Just something to think about.