There is no field for adding Business and Functional users in the CSR. Separate Business and Functional user fields are required. This should also have a feature to send updates to the Business User as well as Functional User.
In addition to above...
Mass Migration by Release is an attractive looking feature but, in our experience, not really practical. I would be useful to be able to change the migration order of CSRs, Archive Sets, and Objects at the release level (which I'm sure was in 5.6 but...