It would be great to be able to output a report to Adobe Illustrator (.ai). This would allow us to refine the presentation, or hand it off to a graphics department to do that for us. It would especially be great for the map reporting tool, as many GIS people finish maps in AI to give a more polished result. This would allow Alteryx to compete better with Esri as far as map creation.
I can only really speak to map creation, but please comment if you have another use case.