Great idea, think maybe you should ask Steemit Inc to pin this post. I've added two ideas, one about a contingency planning community with a coordinator witness (you or @reggaemuffin would come to mind for that role) and one about drawing in established content providers with add revenues implemented in a way that wouldn't expose logged in users to advertising.
I think it is amazing to have a place that accumulates ideas this way and allows good ideas to drift up. This really should get a prominent (pinned) place on the Steemit website to attract more attention, both from users, stakeholders and witnesses imho.