I like alll this. The only issue I have is when he turns his head doesn't move.
Nor does the front-most leg.
Any trained fighter would never turn his eyes from his opponent, as theplottwist correctly pointed out this is why he doesn't move his head.
This entire attack is a pivot, he rotates around his standing leg slightly to make way for his consequent attack while still aiming with his eyesight.
My suggestion is for you to act out the actual movement. You head would naturally turn with the direction your torso is turning. Maybe that's why it looks out to me.
Either way, I think acting out the movement yourself before you sprite will help you in a long ways on animating.
Naturally you would move yes, attack moves executed by trained fighters are far from natural though. More often than not active training is to suppress natural urges in favor of better movement.
Also I do actually act out almost any move I draw, I film myself and use the footage as a basis to determine key frames in the animation.
What parentage are you at finishing Alucard?
It's hard to give a percentage since different animations require different amounts of work.
Here's an overview though:
Walking anim: done (requires reshading)
Crouch anim: done (requires reshading)
Attack anim1: done
Attack anim2: Not started yet
Attack anim3(crouch): About 30%
Fireball attack: done
Jump: Not started yet
Stairs: Not started yet
Injure: About 30%
Transform: About 90% (requires reshading and some fixes)