Part of finding that second wind in the playoffs includes getting involved physically. For all the abuse that Tavares takes from other players at the very least him and the other Leaf stars have shown some pushback. Nylander had none tonight. It's a concern for the Leafs who seem to need to give him a wake up call on a regular basis.
Ultimately, it's not William Nylander's job to fight on this team. That being said, when there's a scrum in front of the net, at least some pushback would be nice to see out of the Leafs winger.