Every year we struggle with Challenge teams. They are not well supported and seems the same team wins all the divisions.
Ok you ask for opinions! Why again is it nessessary for these changes?
Assuming it is being suggested based on the comment "quoted" above, then why not just limit each team to one division win, maybe limit a rider to one team in only one decalired division. Pick one and stick with it. That way you would be assured of different teams winning other divisions, and probably several more riders may sign up having a better shot at winning. Not same team over and over. I think killing off Sabine and High Plains will only lower team participation if they have to drive to all races to have a chance at placing.