I'm certain flashing multiple nodes at once isn't there. I don't have any insights beyond other users' comments that flashing one node consumes most of the BMC's memory and compute resources. As far as network settings, I have no idea what you mean. Code was added to aid migration for users with Turing Pi v2.3/v2.4 boards on BMC-Firmware v2.0.5 who had made /etc/network/interfaces changes.