No, because all it requires is that you give the GMs the skeleton of your arc. And as it has been made clear, this is to be used when the RPG is slowed to a crawl. It wouldn't surprise me if this idea was inspired by us GMs in DC because a few months back byrd, wieg, and myself chatted via MSN and we suggested the idea that we contact the masterminds behind the arc to inform them that if they do not do A, we will resolve to taking matters into our own hands by doing B to get the RPG moving.
In this instance, though, the heads up was enough to get the game moving but we were prepared to take charge to not let the game die.
Now, let's look at the same situation but if this rule was applied. The arc I'm referring to was Watchman and Keyser Sozes amalgam Final Crisis/Blackest Night arc. All they would have to tell us is the key points in the story so that when what happened happened, byrd, myself, or wieg could just do a post or two to get the game moving.
It doesn't remove improvisation. They aren't asking for a detail to detail heavily outlined thing. Just the key points. They said "basic rundown".