To extend what I'm trying to say is that customers shouldn't have to do this and that updating of this data (which ideally should be in a machine readable format, much like ip-ranges.json) is just another step. I would like to hope that AWS already has playbooks for taking a region out of closed-beta and making it GA. If the listing of af-south-1 is already present on other sections of documentation this may already be the case.
I'll send the feedback through anyhow.