While changing and improving their content and the "form" of the article is probably time best spent -- probably we would do more to improve the experience for

While changing and improving their content and the "form" of the article is probably time best spent -- probably we would do more to improve the experience for the audience by dumping the PDF and moving to web based articles entirely, structured data, html papers, linked content and customisable viewing experiences would all improve the reading experience massively.