Regarding Bosh, he's really soft down low against guys heavier than he. I agree with what was said. Regarding James, like all great scorers that came before him, he now has to pick his spots when he decides to drive. He's not getting any younger. And though he's bigger and stronger than most people in the league, his body is still subject to wear and tear just like anyone else. When you drive, you go into a war zone. In the NBA, there is no such thing as easy points in the paint. NBA defenses turn into the N.O. Saints under Greg Williams when people come into the paint. So, I can understand why we don't see him driving the entire game.
Regarding the Knicks' lineup and rotation, I don't watch them enough to be able to get a feel of whether they're better with Amare' coming off of the bench.