Updated everything.
Since there hasn't been a rule regarding transfers during the Qualifiers, I had a discussion with various people about this issue today. We came to the conclusion that it might be unfair for some teams if we allow players to join a different team that is still playing for a spot in the groupstages after their original team dropped out. It would be like a second chance, but since we cannot give every player/team a second chance, we decided to prohibit transfers during the Qualifiers. However, every player will have the chance to join a different team during the groupstage, since with GSL groups, there are no pointless games (unlike the qualifiers, in which we have used Round Robin format).