Adding the Ultraviolet Index would be great to be able to have, especially in Australia where the big hole in the ozone layer is located. It would be nice to have it on the weatherstation indoor preferably but on a smartphone will do also.
Also, building the NOAA radio into the LCD base-station would be a big plus. I'm someone who prefers not having extra boxes to add this and that... Why have dedicated devices when they can be integrated.
So I highly recommend that these be added to your products.