The Leafs are in a much stronger position than Nylander.
Currently tied for first in the League, even though they were missing their best player for almost have the season.
They are third in the League in goals against average and third in the League in goals for average.
They are doing fine without him.
Nylander stands to lose a year's salary (minus whatever he can arrange for himself in another, lesser, League while risking his health with no long-term contract signed).
He is a valuable asset who isn't going to be traded away for pennies on the dollar just because of the December 1st deadline, even though a lot of Leafs haters have their fingers crossed.
That would be terrible asset management for a team looking to be competitive every year going forward.
It's pretty easy to see who has the most to lose by sitting out which is why I fully expect a signed contract paying Nylander no more than an average of $7 million a season over the next 6-8 years, which would be a fair deal based on his closest comparables.
Barring that a 3 year bridge deal for under $6 million on average.