Managing Customer Numbers is a function of administrative staff in law firms. The new requirement to have the practitioner sign the change is impractical because partners do not want to be bothered with these administrative tasks. They prefer to instruct their administrators to make the change and the changes to then be completed.
There is no current requirement for practitioner signature in Private PAIR. The existing workflow is desired over a requirement for the practitioner to sign an administrative form that they never actually work with.
Providing the practitioner with a notification is a great improvement as it demonstrates that the administrator has completed the requested task.