Reviewer Report Page
Could you create a form for reviewers to report egregiously bad indexing. You already have 95% of the job done on your "Labs" page. Just use that code but put it in a form where a reviewer can tell you about a very badly indexed batch and why.
(Your labs page is usable only if the reviewer is returning the batch for reindexing. You miss a lot of batches that need to be reported.