I don't think Boston is as set as people think, especially with respect to Irving.  Irving is a different animal, and I don't think what they are doing now works well with him. He's a ball stopper.  Also, you are going to end up taking minutes/touches from people and most people play better the more they play and the more they touch the ball.   The other issue you have with Irving, he's now had 3 knee surgeries on his left knee.  I know he's not torn anything there or having them clean