Are you ing re ed? That wasn't the typical "play Splitter/bench Bonner" post. And even if it was, who cares? I don't give a damn how many times it's been said, it bears repeating. Why else do you think this team made Bynum, Bogut, Milicic and now Gasol look like prime Chamberlain, Abdul-Jabbar, Olajuwon and O'Neal? It wasn't a coincidence.
Take this series for example. Because of how their front court is built (and because this coach is a re ), they can't afford to have their best option to defend the opposition's best player defending him. Duncan should actually be the primary Randolph defender, because he's the only big with the length and enough strength to potentially do an adequate job. But they can't have him defend Randolph, because that would leave Gasol with a significant mismatch. So what's happening is, they're at a disadvantage in both match-ups (obviously Duncan is better than Gasol, but Gasol's got him by two inches and a lot more pounds than their listings suggest, so from a physical standpoint, he's at a disadvantage). Their best chance would be to play Duncan and Splitter together for long stretches. But that makes too much sense.
They need a big who has the mass to defend Gasol, to free Duncan up to be the primary Randolph defender. In other match-ups, such as the Mavs, they need someone mobile enough to defend Nowitzki, so that Duncan can defend Chandler. In other words, Duncan is without a true position defensively at this point in his career. As such, he needs a specific big next to him, who can do an adequate job of both, so that they can choose the best match-up for Duncan depending on the opponent. Duncan shouldn't have to be the primary defender against power fives.