This doesnt qualify as a flash cartoon. But O well
This looks like a good effect for what could be a good movie. It seems like you have got some kind of wardrobe, which is good, because crappy costumes = good a potentialy movie taken unseriously. As far as graphics wise, the effect is acomplished very well, and I didnt notice any inconsisency in the blade graphic in different frames.
I give you, however, some suggestions:
-Invest in a tripod.
Tripods are great for that same shot you just showed us, so look for a cheap one. Some old 35mm photo tripods still screw into DVi camera bases just fine. Thats what I've got.
-Fine tune the effects.
The way things are now, the effect looks great. To make it look better in the final product, try adding sparks or dynamic lighting to the frames w/ photoshop for that extra effect.
-Remember Internal and External RHYTHM!!!
Always remember, the rhythm of whats happening has to match the speed and transitions of the shots. A long, drawn out fight scene looks better when shot from a mix of shots rather than one long single point of veiw shot.
Anyway, GOOD LUCK AND STICK WITH IT!!!