Flag changed purchases, compare promotion pay. Every one is ready to run, and you can adjust it in plain language.
Track which client proof requests the latest file addresses.
See which requested edits made it into a revised proof and which still need work, right beside the files on your review item.
Show the old sign-off beside the revised file for a new decision.
Your delivery manager gets a fresh review when a client deliverable changes after sign-off, with the earlier decision linked and the handoff held.