Given they show up in the channel list as "sub-channels", discoverability and moderation should be straight forward and this blog post devotes an entire section to Moderation tools, so I'm cautiously optimistic on that part at least. (Especially in comparisons to Slack's Thread moderation which was rough in what little I tried to do of it.)
The catch is that they only show up in the channel list if you've "joined" the thread. They're otherwise just hidden behind the button up top (or you need to hit the backscroll).
