Heya Earl

Smokin' is on the right track. Finding the radar tower is pretty easy, because its structure is so different from others. I also look for patterns of the pavement and dirt paths to help orient me to the area where I will expect my target to be. Zoom is your friend, and I recommend to have it mapped to a button as well as the ability to zoom in and out. As far as video card settings go, I have a pretty slow and low tech setup, but I can still move the detail sliders to the left a bit when targeting ground objects. When I am using guns, I move them back to the right for the best fps as possible.
Back to your original request, I don't see anything wrong with increasing the depth perception on all ground objects by the use of the new beta building bump maps. There would be no reason to label anything if its shape was distinctive enough. Currently, shadows on buildings and bump map on buildings (from beta) hasn't given the environment the "pop" that a good old fashion eyeball is able to.
My only criticism of the terrain features of AH is that they are too flat (not near tall enough). If things like maybe the hangars, trees, cities, even field and town guns had a larger and taller scale, it would present a more life like environment (even if it were not the appropriate scale).