... "EU member state" was not the term employed!
So you are essentially changing the subject.
Had the summary referenced "member states" I doubt any of the people who have commented on the strange use of the word "state" in isolation, in this context, would have done so.
Interestingly enough, it is still the term "countries" that seems to be preferred.
http://europa.eu/about-eu/27-member-countries/index_en.htm ... although there is one reference to "member states" on the page.
If you can't defend the use of the word "state" in this context, unmodified by "member" or "sovereign", and uncapitalised, then you are effectively conceding the point.