I realised I had said this to a Council Member in chat, but not posted here.
Battle has to be maintained and updated by an Admin, since it requires that kind of access. A Cage Master could certainly do the few things you mention, but most of the work is for the Admin. As such, one of us will bring it up with the Council when we know we have the time to develop Battle. At that point the Council will define the Cage Master's (if that will be the title) job and subsequently hire an appropriate number of members for the job.