Howdy, @mike2246 !
The alpha build adds a sync report that will tell you which files were skipped, and why:
Batch operations aren’t supported until I add user authentication (which is the next feature I will be adding after the current version is released).
Batch ops will support recursive-for-tag, search results, and arbitrary selections.
PhotoStructure knows how to extract from sidecars and metadata headers that contain face information (from Google Takeouts and a bunch of other DAMs):
https://photostructure.com/faq/takeout/#extra-credit-name-parsing
Native face detection and aggregation is the highest-voted-for feature request, and will be added soon.