The task to review a proof should be integrated with the Proof itself - ability to have a proof in a Workfront project that is the same as reviewing the proof. Provide a decision on the proof, marks the task complete and continues with the Workfront workflow.
Some of our team is waiting for a ProofHQ e-mail when all decisions are made, but combining the Proof, the act of reviewing that proof, and a task within Workfront will help streamline the workflow.