This gives Saints an unfair advantage without a doubt, and only the greatest optimist could think otherwise.
It might seem unlikely too, but it could also possibly give Cas an advantage over Crusaders because if we lose then Saints will be happy to rest a player or two for the play offs knowing that defeat wouldn't hurt them as long as it was by a narrow margin.
It should be written in stone at the start of every season that all games on the final day must kick off at the same time, as happens in football. Sky can choose the time, as they do in football, and show two matches concurrently if they like, as they do in football.
Sky are happy to do it that way in the sport they invest most heavily in, so I don't see why the RFL should bend over and let them do whatever they like.