I will simply say this....several interested ladies at my school were having a discussion about this right after we attended RUSH. The spoke very boldly about how 'paper' sucks and so on....but, I bet getting paper with regrets sucks more than being 'paper'.
I do not give a rats ass about what anyone has to say about me or my Sorors, because who is running it on my campus....we are! No, I am not saying this to boast, but we are not only in many orgs, but hold leadership positions in them as well. I hope that the prestige of the organization means more, but I doubt it since you said that, 'they have that one flaw...'
Also, there are hundreds of thousands of members in the D9 sororities, so do you think that any one of them will change their process because of one person (or a few)? Probably not.