We have just added the capability to add optional comments to approvals in Service Catalog, Changes and Releases.
Now, when a user receives a request to approve via email - once he gets to the landing page from the link in the email - he is able to add an optional comment which is added to the process. See following screenshot of the landing page from the email:
Followed by a screenshot of the comment added:
A technician can also add a comment from within the app - see following screenshot:
Followed by the comment now added:
At your service,
The Samanage Team