Especially tasks such as the ones listed in ElasticSearchBackendQueueProcessor, but there are several others too.
please hold on the TODOs which are in the ElasticSearchBackendQueueProcessor specifically, most are taken care of by 's open PR which I'm reviewing with him tomorrow.
Would be great if you could verify which other TODOs are still around, and convert them to JIRA's. Once we have issues properly recorded we can mark this issue resolved, then prioritize them individually.