I think the attack should be faster, at this point your doing a slow-motion scene. Not trying to be a critic but I think this isn't the best you can do.

the only way you improve is to find your style, you cannot truly master my technique as well as I can never figure how to animate like you. I can tell you one thing, blurred attacks HAVE to go faster, or the blur isn't a blur. It would be like a person throwing a incredible punch at you then it only hits 1 second later. I would suggest you try different things, try mash up a few different styles inspired by other people. Also I can tell you my secret weapon in stick fights :)... Vibration or something that happens when objects collide, for me it could be a comical effect or the ground shakes, or the screen flashes. It really makes you think the animation has power, I can't wait to see your animations evolve to a new style! Remember one thing in animating: Infinity Limits -Infinite :)