I'm going to do a very quick answer to all three.
First, on what the people want, let's start with research. There's no empirical evidence that I know of where we've ever asked people what they expect out of the debates. I think we would be surprised by the answers, and that should inform the work of the commission, so I would strongly support that.
In terms of networks and parties and their role, I would say the role should be input but not decision.
In terms of public costs, I would say in the grand scheme, given how important these debates are, it's a small price to pay.