I have no objections to removing DR:MS in addition to removing MSQ duties from DR:Mentor as people can run these duties with Duty Support if they don't want to wait for queues.
However, removing DR:MS alone is not a good alternative to removing the MSQ duties from DR:Mentor because then only mentors would be filling those seats, which, as I have maintained every time this topic has come up over the years, is a gross waste of mentor time.