Okay -- I have a new suggestion. I've been using the nav on my Volt a lot lately, and one thing about it really bugs me. I'm guessing it is fine the way it is in big cities, but out in the boonies where I drive, the nav map shows little information regardless of zoom level. There are roads, but they are not major roads, so you have to zoom in really far to see them, at which point you are zoomed in too far to see much, so you still don't hardly see anything. There are stretches of Interstate 70 where *nothing* but the interstate is shown, even though there are roads and exits within the map area. Add some kind of level of detail function, be it automatic or manual control, that
allows you to show more roads when out in the country or in small towns, and fewer roads in a crowded city.
I've attached an example. It's not the best one I could come up with, but it gives the idea.