The main thing is that the organizer has time to download it; others will manage during the Walkthrough. At the moment, only one thing is known about patch 2.2 for the addon — that it will exist, but there are no deadlines or anything more concrete.
Therefore, if the situation does not change by May 30, the tournament will be held on version 1.5. Moreover, I want to set the race as Necromancer, because TE imposes too many variables on the Walkthrough process. And it will be clearly visible to everyone how a person broke through this or that battle. So for now, the "replays" argument outweighs EVERYTHING else.