I like the chance of early surprise eliminations. Moreover, a GS game should get over before the GS does. So there is an additional time constraint which yours would not have. Also, many people would not be interested in many of the matches in the first few rounds here. This will effect your game too, but to a lesser extent. (In case you think I have revealed too much of your game, let me know and I will edit this post.)
You have revealed nothing.