The fact that your daughter has been placed with bullies and no friends is the biggest concern to me. I would absolutely bring it up and ask to have a meeting with the teacher. I'd just say you're concerned after all the discussions last year that she has been placed in a class with known bullies and no friends and you would love to hear more about the reasoning behind the decision to put her in that class. As that discussion unfolds I would then either be happy for her to stay or put your foot down that she really needs to move classes.