Hey Jonathan- Have you figured this out yet? I definitely should be do-able with the StreamDeck. Off the top of my head I can't recall if there are any caveats with the Vision, but I just set it up on a Carbonite a few minutes ago. On the streamdeck, you'll want to get the Companion App from BitFocus. Via this app, you'll configure a "RossTalk" connection to the IP address of your switcher. From there, you'll configure your Companion buttons with Rosstalk commands to do what you want to do. The commands appear in a dropdown menu and are pretty straightforward. Once you get to this point, if you need further help, google "Acuity/Vision Rosstalk Commands" for the Ross webpage that explains the commands. You can do all the above...MLE1 BG bus, Aux Feed, or Custom Control.
Holler if you run into issues.
#Carbonite