I would like to see an option to be able to be checked to have adjust directions as hold rather then toggle: eg, hold adjust key and forward forward to stay in high position and release forward to return to normal rather than press once for 1 increment and hold to cycle through.
Also, if a player is holding high forward then presses left or right, put then in the next stance UP that allows leaning, and the opposite with holding the lower back button.
What this will bring is more intense fire fights as people will be able to control popping out of cover in a more smooth and controlled manner.
As it stands, the stances feel too rigid when cycling through the stances during a fire fight.