Escalate late approvals, open follow-ups, remind reviewers. Every one is ready to run, and you can adjust it in plain language.
Receive a digest of creative deliverables whose owners stayed silent.
Owners get due date reminder emails, and your project lead sees who has not posted an update by the milestone cutoff.
Confirm each reviewer's direct access before sending a proof.
See whether your reviewer has direct access to a proof before you ask for feedback, right in the conversation where you asked.