Currently we're just printing the exception thrown, e.g.
info.magnolia.cms.exchange.ExchangeException: info.magnolia.cms.exchange.ExchangeException: 1 error detected: Message received from subscriber: Parent content /test is not yet activated or you do not have write access to it. Please activate the parent content before activating children and ensure you have appropriate rights on magnoliaPublic8080
which might eventually be confusing for editors. A message on what has happened and how to proceed with it might improve the user experience.