You're not excactly encouraging people to update vague descriptions. Why? I've seen it a few times now that if someone enters a second, detailed description for a game, this text will appear only after you click on "more descriptions". In other words: The old, vague text stays the main description and is not substituted by the new one.
You know what? He's absolutely right. From now on, we're changing our editorial policy to make the best submitted description the default one. So now you guys don't have any more excuses to not write better descriptions. :-)