What makes MACON plants so different?

Watching back over earlier seasons the layout of Slucifer and other Macon plants seems more common than how MSI designs their plants. Little Blue, Fort Knox, the Kiwi Plant, even Freds Trommel had a similar seeming layout. Shaker or Trommel in the middle, slice runs on either side, and a built in tailings conveyor over the end of the slice runs. So what makes MACON plants like Slucifer so much more effective?