At my company we use Asana for tracking tasks.
When I put up a Differential review for an Asana task, I want to link to the Asana task because the Asana task will often have a description and discussion that provides more context for reviewers looking at the Differential review. What I end up having to do is manually linking to the Asana task in the Differential review summary.
We also want the Asana task to stay updated with the state of the Differential review (e.g. created, submitted) so we can better track the progress of the task. For example, we assign Asana tasks a tag to indicate the task's current status. This allows us to create queries in Asana to monitor the progress of a project by seeing which tasks are under review, have been submitted, deployed/completed. Currently we have to manually add add/update the tag on the Asana task after we create a Differential review and when the Differential review is submitted to accomplish this.