I didn't read all of the article but as far as I know we are not getting any new ratings. Personally, I think the fact that the MPAA, which has been rather hard-headed in the last 30 years, is willing to accept that they need to make changes having seen a documentary that outright rips into them is a good thing on basically all fronts. I think the ability to reference other films when appealing a rating is a big deal, and hopefully the MPAA will continue to revise their system.

If people don't pay attention to it, it's not the MPAA's fault.