Buy in or credibility with the players or whatever you want to call it is a key attribute towards coaching success. It is a very difficult thing to quantify or measure. You have to decide by watching if a team is listening to the coach or not. Even good coaches usually get tuned out after a period of time. It is very rare to be like Popovich, to be a long term coach of a team in the NBA. This is what I think Bickerstaff was getting at.
Right now, it is my observation that the team has bought into what Mazzulla is preaching, that is clear, just as Bickerstaff is saying. To me, that is the most important thing. I am not that worried about rotations or time outs. For example, to me, playing Kornet or Tillman is inconsequential, easy for any fan to second-guess.
I think the team still dribbles too much and does not have enough off the ball movement. That is at least partly a coaching issue, head coach and assistant coaches. But it is not something a team implements overnight. It takes time, more than 1 season with a core team. I don't know how much of this is Mazzulla not knowing or the team not having learned yet.