The content in the IPY layer is good already, its just the best stories aren't most apparent. Rather like a newspaper, its key to emphasize the big stories on the front page.
Old Newspaper layout
Think about all the immediate rules that you interpret from the layout of this Newspaper: newspaper title at the very top (Cheboygan Daily Tribune), headline is the biggest font near the top(Japs Declare War on U. S.), summary of the headline story is underneath (Jap Planes bomb both Hawaii and Guam) and photos relate to the columns of text they are close too.
Designers should be looking for the central narrative that they are trying to present to the public and emphasize it. At the current time we haven't evolved the 'norms' of how this should be done in a virtual globe such as Google Earth but, as with newspaper design, that will evolve.