Kessel was described as a great teammate and a freak athlete, but won't go into corners, so definitely lacks some grit later in his career.
Kessel's production has fluctuated all 3 seasons in Arizona, after being dealt by the Pittsburgh Penguins in 2019. In his last season, he put up a total of 52 points in 82 games, which suggests his trajectory is closer to that of Jakub Voracek at this point in his career, as a great passer instead of a goal-scorer.