i mean, there's probably still some rolling shutter problems, but i don't really know the degree.
i've never been bothered by rolling shutter though, i don't even notice it in action sports because theres so much to look at and everything is shaped oddly (instead of a straight building), so it's harder to notice any distortion.
the only place where i can see rolling shutter being an issue is in very professional applications, and even then most people without technical knowledge of cameras probably won't really notice. so in a way, it might not be bad in action sports anyway since they don't require the most professional cameras.