Can you provide an example of what you mean re. the difference between sheet music and a jazz chart? I have played classical and jazz winds for years and consider them almost synonymous. (You probably won't find "changes" in the kind of sheet music other than that musicians call a "chart.")
I don't feel that any written music can or could adequately convey the feel, shape, or nature of the music--you've got to work through it with the group, or hear someone who already understands the piece.
Most jazz charts I have used just have the chord structure and the melody all on one page, whereas most classical charts I have seen (and the very very few I have used) have a lot of very intense information, and I understand that they have that much information because that is the style of classical music, but I personally very much prefer concise jazz charts.
I don't feel that any written music can or could adequately convey the feel, shape, or nature of the music--you've got to work through it with the group, or hear someone who already understands the piece.