The analysis is cool. The problematic thing is what would have happened next, if this tool turned out to be any good.

Publishers rejecting manuscripts because "this years trend shows customers are looking for vividness in the 70+ percentile, your book is only at 55". Everything becoming the same style. If you thought Hemingway, Joyce or Nabokov had it bad with rejections, there'd be zero chance for actual innovative writing to break through the walls of The Algorithm.