I would like to address an issue regarding the rankings for group stages.
Just for reference
Rankings of each group are determined by sorting the results of each team's performance in the following priority:
1. Most matches won.
2. Have higher {(the number of maps won) - (the number of maps defeated)}.
3. Most maps won.
4. Have higher ∑{(total score difference) / (maximum score)}.
5. Winner of the rematch.
I believe that number 3 may need to be revised.Intuitively, winning more maps seems deserving of a higher rank, it's important to note that it is only taken into account if the two higher priority results (matches won, and maps won to maps lost) are equal. If two teams were equal in matches won, and equal in maps won - maps lost, this current ranking system would declare the team with the lower win/loss ratio as the team with the higher rank.
For example
Let's say there is a group consisting of 4 teams facing each other in best of 7 matches, so each team plays a total 3 matches. In this group there are two teams, Alpha team and Gold team. Alpha team wins 2 matches 4-3 and 4-3, and loses one 3-4. Gold team wins two matches 4-2, 4-3, and loses one 2-4.
In this case both teams have won two matches and lost one. So they are equal in most matches won (priority number 1). Alpha team has won a total of 11 maps and lost 10, while Gold team has won 10 maps and lost 9. Thus in regards to priority number 2 (Have higher {(the number of maps won) - (the number of maps defeated)}.) They are equal as well.
This means that we must go the number 3, most maps won. Alpha team has 11 wins as opposed to Gold teams 10, thus Alpha team would be the higher rank. But there is a problem here, Alpha team has played a total of 21 maps and won 11 of them. Alpha team's win rate is 11/21 or about 52.4%, on the other hand Gold team's win rate is 10/19 or about 52.6%. While these values may seem close, what's important is that Gold team has won a greater percentage of their matches.
In fact no matter what numbers you produce, if you assume results 1 and 2 of two teams to be equal, the team with the lower percentage of wins, and consequently the higher percentage of losses, will be the higher ranked team.
I believe that priority number 3 should be changed to the team with the higher percentage of wins as that would be a better reflection of which team is more deserving of the higher rank.