|I'm with Helene. A border needs to either add to the picture, or be silent. this one draws me out to the edges, when clearly the nicer part in the middle. I'm not convinced it's undersexposed, but it is dark; the only difference being that you can fix dark, you can't fix underexposed :) all the details are there, even in the shadows. I think the blur comes from the compression, but I could be wrong.
Compositionally, I really like it; the crop works, particularly where you cropped on the left. It makes for one beautiful flowing line across the screen, disturbed only by the border (sorry). Using top lighting was a great choice to bring in some more topography (in ref to your title :) )
Is this you?