And A5 is just unheard of. In the USA , modern equipment and the unrelentless drive to climb ever bigger and more difficult Big Walls, has pushed aid climbing to limits that were unimaginable a few decades ago. This has also changed the interpretation of the rating scales. Hanging from gear, stepping on pitons, pulling up on nuts, etc. Everything that doesn't require aiders and can't be honestly called 'free climbing'.
Placements are easy and bomber.
Each piece should hold a fall. Solid but often awkward and strenuous placements. Maybe a difficult placement or two above good pro. Falls pose no danger. Moderate aid, but with more tenuous placements above good pro.