I know that there's a lot of advocacy and campaigning going on. As someone who has a lot of experience working with big-pharma, supplement companies and dealing with the FDA I just want to say keep fighting, but don't hold your breath.
The FDA doesn't exist to protect you. They don't care about your health, and they certainly don't care about petitions or what people think. They exist solely to protect the interest of the monopolies in the establishment. Big-pharma. Agriculture. They want to control what you can put into your body and who you can pay to get it from. That's where their interest ends.
My goal here isn't to convince those who may hold any illusions to the contrary to believe me. I won't go into my personal experiences or argue about it - but a good example is a movie I just watched called "Dallas Buyers Club" - pretty good flick and a somewhat accurate (although watered down) account of just how evil the FDA is.
Almost 30 years close enough to really see how it works in government, I'll second your observations. And append that with they will be getting a lot of assistance from the rest of the political machine in doing so.