That isn't regression? What exactly would you call it? "Getting better"?
The fact that his PPG continues to drop with even more time with McDavid is bordering on incredible.
It's as if his downward scoring trend looked at Connor McDavid and said "**** you, I don't care if you want to go for a scoring title and are healthy for 82 games, I'm still going to find a way to score even less this year".
That's some dogged determination in scoring drop age, I wish the other aspects of his game were that persistent.