Benefits of allowing more than two QC-votes per round

Ascertain whether permitting replicas to issue more than two quorum-certificate (QC) votes per round on a proposed block in the Raptr prefix-voting Byzantine fault-tolerant state machine replication protocol provides any benefits, given that such additional votes would not violate safety.

Background

Raptr introduces non-binary voting on prefixes, allowing replicas to vote on the longest locally available prefix of a proposed block. To balance progress and complexity, the protocol currently permits at most two QC-votes per replica in a round: one after a configurable timer expires and another when all referenced batches have been received.

The authors note that safety would not be violated by allowing more than two QC-votes per round, but they do not establish whether such flexibility yields any practical benefits. Clarifying this could inform protocol parameterization and potential optimizations in dynamic or adverse network conditions.