My take
Liquid got the invitation because PV withdrew from the tournament. Somewhat a second chance, but unfortunately for them, they need to fight Falcons for the slot. We have the same situation as Yandex/Aurora, where Liquid won against Falcons in the group stage, but in a BO3, I'm leaning heavily on Falcons to win. You see, the H2H matchup is also in the Falcons' favor, and they always drag these games to extra late, where ATF will make a difference.
✓ Aftermath
Even without Malr1ne, the Falcons still won. Regarding Suma1L, in the first map he looked kind of off, but in the second map, I really think he made the difference in the team.