How can we improve WHMCS?

The current permissions in the Administrator Roles are a great start, however, based on our latest experience, it needs to be revised to allow the following:

SUPPORT STAFF:
1. Allow an option to prevent SUPPORT STAFF from closing a ticket (Administrator should be able to do this)

CLIENTS:
1. Allow an option to prevent CLIENT from closing a ticket (Administrator should be able to do this)

Recently, an inexperienced support staff closed a ticket, which confused a client and made us look as if we're unprofessional.

NOTE: You already have an option to PREVENT DELETE TICKET, why simply not add an option to PREVENT CLOSING TICKET?

Thank you
JR