I like the center treatment of the state selection for a dynamic panel, but when I select a panel within a panel, the parent panel state selection dropdown moves to the far left. I don’t see why it couldn’t be moved to left of the child panel’s state selection dropdown and the whole UI stays centered. It would help to keep your view in one area when you’re managing the views between panels instead of darting back and forth.
Related, maybe make the whole name of the panel and the states a clickable area to trigger the dropdown. Unless those titles do something else, it might be easier as a click target.