Two thoughts.....
First, does anyone really believe that Ty Corbin, is calling the shots on this team? Sure he might hold the clipboard, he even tells people to go in now or then, but he is a nice guy, a passive aggressive yes man. KOC controlls, because Mama Miller allows him.
Second, NBA coaches don't have that much to do. 24 seconds to get a shot off, official timeouts at regular intervals so players don't get winded, 6 fouls so no need to manage that,. The NBA game has been stripped of much of basketballs potential in order to showcase the stars athleticism. Yawn. The rule is: Coach keep your star player happy and a majority of the guys buying in and the second rule is rent don't buy.