I am back form a trip to Mexico and i am glad to see this conversation taking place about this important topic.
My five cents is that our main problem has lot of do with access.We need to get rid of the junior member access problems.Backroom access problems and the likes. We are like a coffee shop which is behind a labyrinth, while for example TWC is right next to a crowded street with huge neon lights flashing out. If people have hard time getting settled to here,they dont stay. It is like finally finding your way in and then being refused to order anything before you die of thirst.
It could be said that there are risks of making the place crazy by opening the flood gates, but i think that only a challenge for the moderation team. I say we open the gates and light the beacons that we are here by creating content and if something undesirable comes in the gates we Moderators can send it back where it came from if there is enough of us and if we are committed to this place.

Thats my five cents.