Rather than press hold, then release, then press hold again- have heavy attacks fire off continuously for as long as the right mouse button (or whatever button is assigned) is pressed.
Same for light attacks- rather than clicking the left mouse button repeatedly and frantically and risk breaking your mouse or developing carpal tunnel syndrome or something. I think it will be a lot easier and help combat feel a bit more fluid.
Edit: Have blocking and other current right mouse button features (like whatever the void gauntlet does) reallocated to a different button on the keyboard. (just not the middle mouse button, not everyone has those.)