Rookie campaigns ultimately do not determine the overall future of an NBA player. In a few cases, players are thrown right into the NBA’s proverbial fire, and they either sink (Kwame Brown), swim (Andrew Wiggins), or they surf (LeBron James). These cases are usually reserved for top overall selections, which all of the three players mentioned above were. More commonly, you will see players accumulate a low usage rate in their rookie campaign, and they are used as a complimentary piece with only a few sets specifically designed for them.
Marcus Smart fits exactly into that common category, and I believe Brad Stevens has used him to perfection in his first season.