In RO 3.3 you have
(1) hold "shift" and "W" together to sprint with upper body lowered
(2) hold "W" for slower movement in which your weapon is raised
If "shift" is taken out and instead stance cycles your movement speed (standing=sprint, crouched=walk) then the benefit is that you have one less button to worry about, but the cost is that whenever you move in crouched your character is going to rise up.
(1) hold "shift" and "W" together to sprint with upper body lowered
(2) hold "W" for slower movement in which your weapon is raised
If "shift" is taken out and instead stance cycles your movement speed (standing=sprint, crouched=walk) then the benefit is that you have one less button to worry about, but the cost is that whenever you move in crouched your character is going to rise up.