i know man, i fight with it in my wallpapers( i have to use a shitty galaxy s3 to make shots) but actually you can easily improve it with photoshop in camera raw...in particular you can improve in "details"section of camera raw with luminance slider at 45-50% and then increase details with other voices... you can also add a fine grain so image can look more detailed... i make this on a couple of your wallpapers and result is stunning... much more than my wallpapers!