I had a tough time with this one. I think the biggest thing that this is missing is some sort of lock-on/strafe, as I couldn't consistently hit a monster. Swapping between swings is a pain too, possible making them a bit more accessible would be something to look at.
Maybe instead of having RClick unsheath, it would focus on the enemy, and then the different swings would be holding LClick and moving the mouse left for the swipe, or down for the downwards swing, or a quick forward nudge for a jab.
I think this could be pretty fun given some time.