What about the fact that among Marner's 15 assists so far this season, 13 of them have been the primary assist. Shouldn't he get credit for something like that because it's a huge factor when setting up whoever happens to score a goal for the Leafs.
As for 10 of Marner's points coming with Matthews obviously that's going to happen with them playing on the same 5v5 line and on the power play line, so I don't think any Leafs fans will apologize or feel bad when that happens. However among the 11 goals Matthews has scored this season Marner's had the primary assist on 6 of those goals and 1 of those goals he had the secondary assist. His only other secondary assist was on a goal scored by Hyman last Saturday against Vancouver which was their 3-0 goal from that game.
Mitch Marner 2020-21 Scoring Log | Hockey-Reference.com (hockey-reference.com)