Peter,
That’s a good point, which would suggest that the two issues (format and match length) should be voted on simultaneously (collectively?). I would view Format 2 more favorably with 90 or 96-board matches.
Another issue that just occurred to me…it seems that the losing USA1 finalist is at a slight disadvantage, as they are immediately entering USA2 having just played a theoretically tougher match. Perhaps they can pick their USA2 semifinal opponent (assuming Format 2 wins the day) as compensation?
Bruce