I'm not even sure Mullin is calling the shots right now. Overall, I think Mullin has done his job in surrounding the coach with people he can use in his style.
They made the playoffs two years ago, and performed well there. They were also good last year, the West was simply loaded. And this year, well, as I said... I can't tell how much Mullin had to do with the moves they made, and missing Monta hurt them quite a bit (and Baron leaving).