Group eight's matches finished faster because most factions were part of the World Government. The major faction in group eight was the North Federation, and they easily passed to the Playoff Stage after the three factions gave them free three points. The tournament was not that exciting, thanks to the World Government's factions colluding with each other. While it was less exciting, the fight was not less bloody. When the faction from the World Government fought against the faction not from the World Government, they went all out from the start, using their full power to take advantage of the loophole of the accidental kill. Just like that, they easily got away from murder as the referee deemed it as an accidental kill.
Just in case you wondered why I uploaded 1 chapter a day instead of two chapters. The actual content of the chapter should be about the same when I uploaded two chapters a day because I uploaded 1.8k-2k words per chapter, while I usually posted 1k words per chapter.