Sorry, I don't think I made myself very clear in my original post. I am happy with my old AW score, and I have no desire to improve in this area.
However, I would really like to do better on the math sections. As a way to facilitate this, I am thinking about skipping the AW section this next time that I take the test. I am hypothesizing that doing this will give me a better chance to perform well on the QR sections (e.g. mitigate mental fatigue).
Again, I am applying to engineering schools so I am assuming writing is not something that they should care too much about. Especially if I am, 1) well published, 2) a native speaker, and 3) have a MS from a top engineering school.
Does anyone(engineers/science folks) here see my point? Do you support this idea?