Yes, we will have scaling events that bring up dynamic nodes with new ips and then bring them down when load is decreased. This will lead to a large set of inactive hosts over time if the load increases/decreases multiple times a day or over a week.
We have some logic to clean up similar parameters ClusterPeerIP and ClusterAuthorizedIP for this type of situation but thought maybe the DynamicClusterPeers would be self-controlled within the core functionality.