I don't think players necessarily lack tactics or coordination. The problem, as always, it going to be communication. The lost player who have no idea what they're supposed to be doing, and no one tells them. Players will fulfill roles, so long as those roles are obvious and need no direction. So, the 'scouts keeping track of enemy movements' will be the strangest thing I think.
but I've never played guild wars.
But the real reason i wanted to comment was that I liked how you called the parents unruly. lol