I can see use for a new access restriction set. At the moment there is full access or any one of the buses per mobile device.
I would like to make available via password access (moderated by a device with full access) a range of buses and channel mutes.
This would enable a band to use a single mobile device to mix all their monitor feeds and mute while plugging/unplugging instruments without the need to communicate to front of house. Ceilidhs can be quite rowdy environments with little provision for stage vocals.