Any consideration of whether to trade Kevin Durant should also focus on Durant's personality and whether it possibly reinforces the limitations of Devin Booker's on-court personality. Booker's excessive coolness; his lack of fire and his poor clutch performance. Compare Durant, and what he's done for Booker, with Chris Paul and what he did for Booker. Booker appears to need a teammate to push him. Durant obviously doesn't.
This is why I'm so interested in Collin Gillespie: why I hope the team not only keeps Gillespie but expands his role. When I heard that he is a fiery personality in the locker room (note that Durant himself publicly lauded him), I immediately concluded that he would probably provide some of the fire and leadership that the team lacked this season. And since he is a pretty unknown bench player, he would cost little to retain.
Yeah Book is in a position where he idolized KD and possibly doesn't want to step on his toes, all while KD isn't the type of person to be a true team leader on the court.