Tyler’s wrong this time. The hub does act as SUC/SIS and you can include/exclude from the Minimote.
The “all on/off” is a Z-Wave broadcast that doesn’t involve the hub or imply anything about controller status.
We’re also planning to make it work so you can unplug the hub from internet after going into include mode, carry it around, then plug it back in to get the newly added device on the server. This functionality might not be ready yet at launch, though.