I Agree on the additional cost and effort required but the cleanest and
recommended approach would be to move all the assets into S3, perform
cleanup there and then use Bulk Import to move assets into AEMaaCS. This
will require least amount of development effort. Also Bulk Importer
ingest assets as-is from S3, So i would recommend having it in some
folder structure. Dont import everything into AEM and then try to
move/restructure that would be much more expensive and slower operation.
Also consi...