From what standpoint?
Blair needs to rotate a lot quicker from the weak side and become more aware on that end of the court. The Blazers' guards were just going straight to him off the pick and roll, where he was either late and out of position outside the circle, or he was late and had good position inside the circle.
All three of your suggested players had horrible and I mean horrible transition defense. I'm tempted to go back and watch the game because I guarantee you the Blazers scored at least 15-20 points off uncontested wide open opportunities in transition because our players lost their man or simply didn't communicate to pick up eachother's man in transition. All that takes is focus and energy. That's why it is so frustrating.
As for McDyess, I thought McDyess played great one on one defense on Aldridge. Aldridge just hit some really tough fade-aways and contested jumpers all game. I think McDyess is an under-rated one on one defender. He's defended Odom, Nowitzki and many other premiere power forwards quite well.