Well, if there was a marathon that give awards to runners with the best average pace, it'd still be a cool event and many will participate. Noone would complain that the rules were different because they all knew what they signed up for.
Point is, every team knew how champs points worked since the start of the year. Rito made it in such a way so that every match -- even the ones at the start of the year, also the group stages -- they all matter. DRX simply played the long game and was rewarded for it.