Love it. Always knew it was a hard site to route on, and that topo shows why - the big dome in the middle is rather inconveniently placed.....
That's interesting. My first impression looking at the topo was that the large dome was the key to making a routing work on the site. The broad dome interrupts the site's steep flow from clubhouse elevation to Rae's Creek, providing suitable intermediate locations for green and tee placement on the way down and, crucially, on the way back up. Without the elevation provided by the dome, holes making the biggest climbs (namely 8 and 18) would be an order of magnitude more extreme than they are now (and they already are pretty extreme).
MacKenzie is known for routings that use a site's greatest features as many times as possible in a multiple times in a given routing - the most famous example being the dune on the front nine at Cypress, but other examples include the small, abrupt hills that provide the backdrop, green and tee locations for 3, 4, 7, 8, 9, 10, and 11 at the Valley Club. In both of those examples, though not as extreme as at Augusta, the hills and dune serve purposes other than simply aesthetic - they provide a natural brake point for holes sited on downhill slopes and a natural elevated start to holes climbing in the other direction. I think that's a big reason why neither Cypress nor the Valley Club come to mind as being routed on sites with much elevation change, when both in fact have more than you'd think. The August routing uses the dome very similarly - 2 green, 3 tee, 7 green, 8 tee, 17 green, and 18 tee all use the elevation as either a brake or a jump start for a climb. And since everyone who's been there comes away thinking that the site is really hilly, you can only imagine what it might be like without the dome serving the function that it does.
The real genius of Augusta's routing lies in embracing slope as a significant feature of the course and not something to mitigate with shaping/flattening or buying up more land with "usable" slope (if that was even an option).