You might consider mentioning these two earlier pieces covering similar ground:
Peter Suber, "Open access: six myths to put to rest," The Guardian, October 21, 2013.
Peter Suber, "A field guide to misunderstandings about open access," SPARC Open Access Newsletter, April 2, 2009.
Toward the end of Myth 6, you cite "Suber (2007)". But not even I can tell which work you had in mind. Could you list the work in the bibliography?
If you're referring to rights-retention OA policies in that passage, then I also recommend this more detailed work:
Stuart Shieber and Peter Suber, Good practices for university open-access policies, Harvard Open Access Project, 2012 - present (continuously updated).