He does, you cannot lose control as often as he does, miss the chances he does because he lacks the talent and ability to adjust quicker and no what to do before it's even happened. There is no doubt he is improving but he lacks an awful lot ability wise. If Bernado had his pace I don't think Sterling would get a look in. What is key and contributes so much is that movement of his and why his numbers look great.
Out of interest the stats you throw up like big chances missed etc does that involve ones where he finds himself in a good position and doesn't get a shot away. One that springs to mind was Stoke where he allowed the defender to get back and tackle him and Spurs away where he fannied too long in front of goal and didn't even shoot in the end. Is it actual shots, positions what do they measure it with?