I read the rest of your post, just didn't find it particularly noteworthy. I mean, it's not really a controversial claim to say Marner is not producing offensively on the level of McDrai/KucherPoint/MacKRantanen in the playoffs. Is anyone outside Toronto homers even claiming that Marner is on the same level as McDrai/Kucherov/MacKinnon to begin with?
Marner reg season ppg =1.12; playoff ppg = 0.86
Matthews reg season ppg =1.15; playoff ppg = 0.88
Nylander reg season ppg =0.88; playoff ppg = 0.79
Tavares reg season ppg =0.94; playoff ppg = 0.74
Seems like there is something bigger than just Marner going on here. If Rantanen and Marner switched spots, I don't think their results would be all that different