>>17391191. I stated her right shoulder originally, not her left shoulder. Her left shoulder is fine bend wise, and simply has thickness issues. Her right shoulder is the part that does not bend enough. An easy way to figure out how much it should bend is to simply draw the shoulder completely, even the part hidden under the hair. Then you can delete or clip the part that should be hidden.
2. The right side of the bow does not have to curve as much as the left due to the viewing angle, so don't try to force the same amount of bending the that side of the bow. The right side of the bow still looks awkward where the fold should be. Currently you have it look as all one shape, which makes it look out of place. You need to draw the right side of that bow as two separate shapes. Draw a small shape for just the fold in the middle, and then draw the other shape as the underside that goes into the fold on both sides.
3. When vector tracing, your goal is to trace the original and clean up the image. Sometimes there are errors in the original, and you correct them. Blotchy endpoints are a common error from either pen bleeding or laziness. You make the endpoints sharp because that was what was originally intended. For instance, like
>>1739139 said, the blush lines follow a similar principal to the eyebrows. You make a two point line with a slight curve, and it will definitely look better than what you have.
As for the face line, you completely misinterpreted what I said. Every time you make a line, stop for a second. Look where the line is going, and make sure how you draw it makes sense. It is very clear in the original what part of the hair is in front, and what part is behind. Draw the line according to that. I went ahead and traced what I stated above to give you a a reference.
One final note. The aliasing for your images look poor. Make sure you are exporting in Type Optimized (Hinted) if you are using Illustrator.