We run our RabbitMQ cluster with pause_minority as the partition handling strategy. This should eliminate most message loss on partition, no?
That said, the devil is in the details; I'd be interested to know if RabbitMQ is capable of reliably detecting that it's in a minority. We've had issues where nodes are having issues talking to each other, but the problem is not consistent on both ends (e.g. A can talk to B, but B can't talk to A).