I realise that I can add filters for these, and group them that way, but it becomes unwieldy when you want just a quick grouping such as you can with the other fields.
Official response
Lara Proud
We have added support for grouping Ticket Queues by Status, Sub-status, and Status and Sub-status, you simply need to hover over the Queue you wish to apply this to and select whichever of the options you require.