Doc has many strong points. He manages veterans and egos like no one else. The respect he earns from his players is incredible.
But he has also one serious flaw, in that he is loyal to people who have been with him long to a fault. His main problem this series is playing Davis as much as he has. Now, you may say that the shortage of big men made him play Davis as much as he has, but that is not really the cause as he is averaging as many minutes as JO.
There is absolutely no reason whatsoever that Davis should be getting as many minutes as JO and Green this series. JO is +13 for the series. Green has been out most efficient scorer. Meanwhile, BBD is having a team worst -33 for the series, and shooting a team worst 30%. Now, plus-minus may not be the best stat given how much it depends on line ups, but when you are the team worst by such a large margin it can't be anyone else's fault.