Last question (I hope) in this sequence - does OCR’ing the document also take of PDFKIt bug from earlier problem: Automatically take ReadOnly PDFs -> ReadWrite - #9 by mlevison where fonts included in a document, triggered a PDFKit bug which caused DT to mark the files as not editable? (if you recall our previous work around was to Data > Convert > to Paginated PDF).
If so this may well turn out to be an elegant if disk space consuming solution.