I think it's perfectly fine.

Ady: while it would be kinda cool to add some minor detail to the "plateau" shot (with the first shot of the rebel transport), it's not really necessary. It would be neat in a "train set/ military diorama" sort of way, in that you could see the overhead "blueprint" of just where everything is.

I guess it would be more like this:

(1)
you might not have actual "runways" on Hoth, but the point is that even from high altitude, when you have no clouds and snow to reflect sunlight, large objects like the ion cannon and shield generator would still stand out, and large spread-out things like the trench line would show up as well.

(2) http://www.flickr.com/photos/photophill/3295664805/in/pool-airport_aerial_shots
(this is from low Earth orbit - granted, it is a city, but you can still see details of human activity/presence)

(3) http://www.flickr.com/groups/airport_aerial_shots/

(4) http://images.google.com/images?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&um=1&q=aerial+airport+snow&btnG=Search+Images

Again, while it would be cool to see such detail, overall I think the sequence is fantastic as-is and I would rather you work on the rest of the film.