They should make a Ballista server that works similar to the test server, where you register a copy of your character's data to play that doesn't carry over to your primary character.

They'd only really need to include the Diorama zones, so you'd just log in, pick a Diorama, fight people. One of the main reasons people don't do Ballista is the lack of interest. But if there was a separate server where you can just pop in and have a match at any time, and against players from every server, there would be a lot more participation.