Yep, I also think it's kind of a misleading name. It's still Consensus but with stronger assumptions on the network (kind of, it depends on an external master for correctness, which could itself use something like classic Paxos). Simplifying it a bit, they use a single sequencer that every packet must go through to get "ordered". As the authors suggest, that could be implemented in a programmable switch. Given that abstraction, they can simplify the consensus protocol itself.