I love the composition. I agree with mfogiel about the contrast. I'd be inclined to clip the shadows a little less if you can, especially her coat. I love the tonality of the wall. I'm also, like you, not a big fan (or for that matter, much of talent myself) of post-processing. I think that the peeling tableaux behind her certainly sums up rather well what Le Marais was historically. Overall, I like the image as it is. I'd simply play around with the levels a little bit and make a comparison between a couple of versions to see if one pulls out more or less of what you were visualizing when you made the shot. Perhaps after doing that, you'll like this version best.