A full crawl can produce thousands of technically valid observations without explaining a traffic drop. Before collecting more findings, identify the pages, queries and markets that account for the change.
Search Console helps divide the loss into meaningful groups. A directory-level decline, a query-intent shift and a device-specific change each require a different investigation.
Once the affected set is clear, crawl those templates and their internal paths with a specific question. This turns technical checks into evidence for or against a recovery hypothesis.