The biggest problem I saw with Smalling was how weak he was on his left foot. I dont just mean his passing but his touch and technique with his left. It meant that smart opposition players would show him his left side when applying pressure and then wait for the error. He can pass and control with his left but not at the level where he isnt a liability there. He always needs one extra touch on his left to get set and at this level that extra touch is enough to force a wayward pass or slow down ball speed.