Based on DaveR's comment on MB-58013, we can try a new way of routing
https://issues.couchbase.com/browse/MB-58013?focusedId=699028&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-699028
MB-58013 XDCR performance dropped by 15-20% in 7.2.1-5974 due to MB-57304