Yeah or roll or anything, but the point is using it once every 10-20 corner combos, to try and get more damage.
Going for CD charged after s.D isn’t cutting off any damage, and might open great damage afterwards.
edit : just tried with a friend, it’s useful imo, since you can either do s.D, CD (charged) or s.D, throw (beats Guard Attack spammers once they figured out the CD charged) … etc