The unnecessary steps bring some troubles to OEM,and it have been corrected from 4.18-4.20, so could it possible be removed from 4.15/4.16/4.17? The "Disaster recovery" procedures in ocp 4.16, In section: "Restoring to a previous cluster state" procedure~~~Delete and re-create other non-recovery, control plane machines, one by one. After the machines are re-created, a new revision is forced and etcd automatically scales up.~~~ this "step 15" could be removed.

https://docs.redhat.com/en/documentation/openshift_container_platform/4.16/html/backup_and_restore/control-plane-backup-and-restore#dr-scenario-2-restoring-cluster-state_dr-restoring-cluster-state

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Remove "Step 15. Delete and re-create other non-recovery, control plane machines, one by one. After the machines are re-created, a new revision is forced and etcd automatically scales up."