I guess it's about the case when there is one (or more) very team in a group (usually a secondary account of another member) so to lower the avg quality of the group and after the draw, it's buying 5* players.
Then after the games, it's selling the 5* players and remains with the 1*-2* till the next draw.
After the update, I can imagine that the next draw will consider the quality of that fake team, when played the games of the week end.

I hope also the update to include the real avg quality of every member for making similar pairs and not only the current 11 squad during the draw.