Google Drive is Google's file sync app that lets you store all of your files online alongside your Google Docs documents, and keep them synced with all of your devices.
Receive the rejected PDF and reason in an assigned revision task.
Your makers get a rework task with the reviewed PDF and rejection reason, so the next revision starts from the right file.
Find requested revisions in one issue linked to the reviewed draft.
Your editor gets a clear revision issue from comments on your draft page, with links back to the review.