The reason for removing the sugar from the dough formula is to prevent the crust from charring when baked at those high temperatures. It sugar were present in the dough formula the bake time would need to be shorter to prevent excessive color development which in turn would result in a less crispy finished crust. The only place where you want to see anything close to char is where those “cloud shaped” holes are. The high heat serves to improve the oven spring of the dough as it enters the oven, just like the high temperature of the deck does. The disk was developed specifically to allow replication of a hearth baked crust in an air impingement oven, to that intent it works quite well.
Tom Lehmann/The Dough Doctor