The Phoenix Suns need a point guard, or at least someone who can work side-by-side with Devin Booker in a seamless manner that benefits the franchise for the foreseeable future.
There is no doubt that D’Angelo Russell might be that type of player, a dynamic offensive player who can both score (he is averaging 22.1 points per-36min) and dish the ball (7.5 assists per-36, both career-highs).
Adding Russell to the back court with Booker would allow both to handle the ball on offense, but most importantly keep defenses spread thin as opponents will not be able to key in on one guard as they can both score, and find the open man with a quick pass for the shot, or dunk.