Yeah, it actually isn't such a new thought. This is quite obviously been the case throughout the PT. It even comes out in George's interaction with artists and prop disigners on the ROTS documentary included on the DVD. At one point he says something along the lines of, "That is a really good idea! But just not for my movie" right after George goes into a big spiel about how he encourages creative advice from his team. The whole disaster that was the PT shows very clearly there was no one around to give constructive criticism and say, "Hey, this is awful! You can't be serious about this!"