Well at least the contributors to this thread are pretty united, the vast majority say No to the idea of any kind of Players Council. So thats one bit of feedback that has been successful at least.
Personally I would trust the forum Moderators, already appointed by Frontier, to give some general feedback about whats hot on the forums and what we are getting worked up about, in a general way as part of a much larger general feedback system as long as thats all it is, with all groups and communities being valued equally. But that puts more work onto volunteers and they may not want to but its how I used to do it then could follow up with feedback or an asnwer back through the Mods, or make a statement for the Mods to pass on to the groups or even visit them if needed to answer their questions directly or even tell them No and why not. That way they knew their opinions were being passed on and mattered which is what most people actually want, to know they have been heard and not just ignored. But nobody was more special or got special treatment just coz they shouted louder or had bigger groups behind them, that just alienates other people and leads to resentment.