That's flawed logic. The sooner metagaming occurs, the worse effect it has. Yes, people will look at completed games, but by the time they are complete the metagaming will be minimal (however potentially significant)...
I stopped playing in the Leagues, back in the day, because if you won your first game you would automatically be eliminated first thing in your next game, which was pretty stupid... Sure, some would say don't win your first game, suppose those are the people that kept playing in the leagues, which is fine, to each his own, and there will be a certain crowd excited for the World Cup however it is set up, it's just that there will be another set of people that will not be excited and the World Cup may be worse off because of that...