Output: Flattened PDF render option

If you would, please consider having the option of a FLATTENED PDF, after final review and proofing are complete.  As the publisher, we had issues on our end of having "ghost boxes" appear that were not on the final proof.  We figured out that our impose software had issues reading the PDF because it was not a flattened PDF.  Through a few tricks we were able to solve the problem, but it would be nice to have that as an option on the publishers side to select a flattened PDF when the book was ready to print. Thank You!