The moderator actions PubSub topic may not have been officially supported, but given that Twitch Staff announced it on this forum and discussed it’s use with third-party developers, I don’t think it’s too much of a stretch to consider using it. It’s not like people found out about it by looking at the Twitch website with debugging tools, like it may be with some other APIs.
Yes, with a centralized tool that will work. Unfortunately it doesn’t work for everything.