For me the round difference impact was huge, and my RR gains could swing from +16 to +24 (Immortal 3, so no individual performance bonus either)
Thus I think it was a good change. Plus, they're saying it's still there, so it still incentives playing to lessen the RR punishment. Additionally, stomps happen less often than "evenly-fought" games so in the grand scheme of things it should result in higher RR gains for all, since we'll be getting more RR from closer games (which is a more common occurrence).