Anyone who not just watches the game, but actually pays attention to strategy would know that Stevens does not run offensive plays for Smart.
Seems like his role is to run the offense, be available for the 3 if things break down, facilitate when applicable, and harass offenders. If Stevens decides to actually allow Smart to do things for the offense other than set it up for other guys, you would see a high, 18 to 19 points a game PG.