I've been wanting to do this for a while now and finally got around to it. In ARTv1, the tools could publish to a project directory, and that was it. In the initial implementation in ARTv2, you could publish to a project directory and one sub-directory of your creation. Now, you can create limitless sub directories under your project!
Furthermore, you can use an existing directory structure, like your source control directory, as the tool's project path. Then you can publish into that existing directory structure so you can keep your existing source assets and rigs all in the same place!
Also shown in the videos is the new UI styling. It's still a work in progress, but most of the rigging tools are re-styled.
Left: Old Style
Hover states
As always, thanks to Epic and Riot for allowing me to share these tools with you all. Go support their games!