Ahri is way too safe of a laner
Her MS that she gets allows her to easily walk into range to throw a Q and run out immediately after to prevent the enemy opponent from getting in range to punish her for it. Not only that, but the healing feels ridiculous to play against in lane because the few times she gets poked she just gets her health back.
I recommend just flat out removing the MS. Making the ball on the first hit have slightly less base damage, but the ball on return has more damage to compensate and promote keeping perfect Q returns and keeping good range between you and your opponent or actually landing charm.