This happens so far from the tournament that it is forgotten well before the build up starts. If you look at football, the draw is almost part of the tournament and is almost the starting point of the build up and hype. Groups are drawn, training bases announced, travel plans made and publicised and that's before the warm up games take place. I guess the main difference is that you don't get the same groups each time, so there is naturally more excitement to be had with the draw, but I do think a draw closer to the event would generate a bit more interest.