the suggestion to negotiate in the media and interpretation that there are only those two options are absurd, and there's no reason that another team would give Nylander 8M when his multiple comparables (Ehlers, Larkin, Pastrnak) have all been in the same low-to-mid $6M range, that establishes a pattern of behavior from multiple teams that is likely to form the precedent for Nylander's deal.
I'm of the opinion that you let him sit at home until he's ready to sign for his market value, the Leafs have all the leverage unless someone in the KHL/SHL is willing to give him in the realm of the same money that he would make here