Standards development works best when the expert community is open to diverse and dissenting views. The door is already open to the government to listen, participate and propose. If it isn’t broken don’t try to fix it.
PDF 2.0 Application Note 003 identifies precise locations for PDF objects’ XMP metadata to help drive interoperability across all PDF creators and consumers.
PDF/A-4 is essential to losslessly archiving PDF files that use current-generation PDF 2.0 technology… even including scanned documents. From modern Unicode support to interoperability with other specifications PDF/A-4 is the only way to archive PDF files conforming to PDF 2.0.