Pure speculation, but I think Kiss is tired of the lame system Pellerud is employing. I think she may have been miffed, too, that she did not get some key playing time in the World Cup. She is one of the few players both willing and capable of playing the sophisticated brand of soccer we have all been calling for. She passes well, has good vision, is a solid play-maker etc etc/
I am sad to see her leave the team.