One more thing to add. While Dubas was clearly taken to the woodshed in negotiations by Matthews, Marner, Nylander, etc., the one thing that bothered me was the short term on Matthews specifically. Letting him walk to UFA.
It is one thing to cave on money, but at least get the extra years in your favor. Dubas did not.
But, Matthews as a free agent one year after his contract is up, very good timing if you are looking to potentially capitalize on the relationship down the line and help promote your cause as well.
Ultimately, Matthews will do what is best for himself. That is the kind of person he seems to be. But Dubas still might be able to benefit if their intentions align.