I don't know if this is too late to consider, but it would be nice to add the ability to hold a swing back by pressing the mouse down and then releasing the mouse button to actually swing. This would add more skill to the melee combat.

Also, adding mouse gestures to perform low/mid/high swings would be a lot of fun.

For example:

-Hold down left mouse button and your character cocks back his left arm.

-Gesture the mouse up, you are going for a straight head swing upon release of the left mouse button.

-Gesture the mouse left, you are going for a left hook upon release of the left mouse button.

-Gesture the mouse down, and you are going for a low swing upon release of the left mouse button.