The Dallas Mavericks do not have a need at every position. They have one of the most promising young point guards in the NBA and a small forward who can hold his own on both ends of the court.
Although that still leaves three positions that could see some improvement, that does not mean that they are inept at all three spots. Yogi Ferrell, Seth Curry, and Wesley Matthews have all played the shooting guard position well, and Dwight Powell is becoming a serviceable backup power forward.
Dirk Nowitzki is currently playing the starting center role for Dallas, but with his career coming to a close in the near future, it is time to find a more suitable starting big for the NBA as it currently stands.