At Present, adjusting your stance left or right when you are in a high or low version of your stance simply returns you to the default stance, and then allows you to sidestep. This feels indescribably wrong. Preferably, there would be high and low versions of the sidestepped stances to allow full control over your character. Failing that, you should at least move directly to the left or right stance. Hitting a and moving down just seems odd.
Also, at present I am using CH Pro pedals to adjust my lean as an infantryman, as suggested by dyslexi in his moving and shooting video. Like him, I would prefer to have the pedals bound to the horizontal stance adjustments, as this feels more natural than leaning at the waist. Having direct bind access to each stance adjust would allow this, as well as the mousewheel raising and lowering frequently requested.