You could definitely make that argument. My philosophy the entire time had been let teams play however they want, so that the data is as close to the actual balance of the game as possible. Teams were given a reroll for when they just really didn’t want to deal with a certain matchup. There is also a much larger disparity between the skill of teams in NA. There were many matches that were going to end in 6/0 regardless of the factions. There were also less teams, so a much smaller sample size. A round is weighted much more heavily in our calculations than it is in yours.
Overall I think it’s more important to look at the placement of factions rather than nitpicking the percentages. We can clearly see from both tournaments that Battania and Vlandia are very good, while Khuzait is extremely bad.