I'm in a similar boat, 165 Verbal and 4.0 AW. I also have multiple publications and a fair amount of professional writing experience. For our sakes, I hope these scores are seen as proxy measures for actual ability. If this is the belief of graduate programs, they would just look at your actual writing achievements rather than the AW score. I honestly don't know who in their right mind would say, "They have plenty of proven professional writing experience but this GRE writing score is pretty poor, I wonder if they can hack it in the professional writing world?".