While I am extremely unhappy about many things this season, the main thing was keeping Luke around and I have my doubts that this decision was Monte's alone. The man hasn't gotten to choose his own coach yet. Next season when presumably this does happen will be when we truly know if he has just gotten lucky in the draft or if he has a real mind for the game.
The season was still early at that time and Doug may have given the Kings a shot in the arm and a new voice and persona for the team. The sad thing is, if and when Gentry is let go, the new coach will probably pick his own assistant coaches, so Doug may be out too.