In my league, 3 teams tied for first place. So I was really frustrated when the system subsituted one team by a new, much weaker rookie team, 2 weeks before the end of the season . Because of the schedule, I played the strong team and my two competitors played the weaker subsituted team, and gained +30 of points differential. It really screw up my PO preparation. I expect the system to act as a referee or balance, but not to create chaos, especially so close to the end of the season.