I believe the commentators said with a fall the max PCS could only be 4.5. Not sure if that would go down with subsequent falls.Maybe the deduction on PCS should be raised in Ice Dance because a fall (unlike an over-extended lift) ruins the impression of the program? If I'm not mistaking, currently there is a limitation on PCS if there is a fall but not to a degree that it matters much.
It could become an issue though because the skating speed increases and hence the top teams tend to fall more often. Talking about which, it would be very interesting to have ice metrics plainly on speed in Ice Dance. Maybe Japanese technicians will invent that if Dai and Kana make progress