The problem with the World Cup is there just isn't enough representation from various countries, and some countries have a lot of competition while others don't. Like, given the demographics of the board it makes more sense to have 4 USA divisions than to include most countries. Otherwise, most of the board that might be interested in playing just gets left out by default and ends up not caring about the whole thing.
I'm not opposed to the idea in principle, mind, it just doesn't seem like a great fit.