I agree to an extent. Crews filled his team with a bunch of 2's, 3's, and 4's and it was a disaster. But I think that has more to do with his inability to recruit and coach up talent. As long as you don't end up with a backcourt of all the same type of player and a frontcourt of all the same type, the classical 1-5 positions don't matter much. I think you have to have a PG to make any lineup work though.
I think the Center position is now the least important position in college and pro basketball. The only difference-maker at centers are the athletic freaks that only land at places like Kentucky. Athletic forwards and guards now control the game. Teams just cannot compete with an offense designed to feed a big guy with his back to the basket.