Getting a good exposure on in a high-contrast subject like this is difficult, but the foreground drift is perfectly exposed as is almost all the rest of the scene.
(I think the snow on the horizontal ledge is a teensy bit overexposed; that could be carefully corrected.)
Edit: On closer examination I see that the bottom left corner is blown out too, but it doesn't bother me in that position and in the context of a wide range of shades within the drift.
I love the fact that you've gotten some very interesting terrain into the background on the left; both distant peaks and some nearer stuff. Reminds me of a Da Vinci background.
The composition is creative but I'm not sure it completely works. You've got multiple elements: the drift, the rocks, the background terrain, the blue sky. They all converge at the center: not only do they all intersect there, but the line of the distant horizon, the diagonal line of the top of the drift, and the line of the horizontal snowy ledge all lead there, as does the weak diagonal formed by the right edge of the drift. But the eye doesn't want to stay there. The dominant line is the brightly lit crest of the drift, which leads the eye over the snowy ledge and up onto the rocks, which I don't find compelling in themselves. Maybe if you crouched down and/or moved a bit to the right, the peak of the drift would be visually separated from the rocks and the snowy ledge, and you'd have the drift as your main subject.
To me the unusual and interesting part of the image is the texture of the drift especially near its apical ridge. I think you could increase the emphasis on that and still have the other elements in the background. Your choice of what should be emphasized may vary.