I don't have WoG and never will. But I'll probably participate in the first round, if someone tells me where to get the patch to upgrade SoD to 3.2:confused: .
Better here http://www.heroesleague-duels.com/homm3/downloads.php - both the 3.0 to 3.2 patch and 3.1 to 3.2.
But whether it's 3.0 or 3.2 doesn't really matter!
I also thought I wouldn't need WOG. But for the TE innovations, I had to install it. And Horn wrote that there will be no SOD tournaments in the League at all!
I recommend installing it. You can actually download WOG - 40 MB overnight; otherwise, you'll fall too far behind the others in the first round.