I think he means that with the guys winning by decision, keeping a tally of their point differential. E.g. if you win a decision 10 points to 2, your differential is +8.
I think it's also another way of being an additional tiebreaker on top of your bonus submission points.
Yes QFC should probably be restructured anyway if the initial points are changed. And ideally weighted so it has very little (but still some) impact on hype.