We just played in the beta test for the premier playoff tourneys, really fun overall and I enjoyed the pick/ban phase finally being implemented in the game. However, one of our team members had to leave after we won the first two matches and we messaged our sub. It was here that we discovered that they could not leave the party to allow the other member of our team to join, even if they were online. Hopefully in the future this can be allowed as its a better experience for the players in the event that someone has to be swapped out.