Didn't you just make my point in your own post? MacK extended the moment he was able to, he didn't withhold for more. He got paid about what McDavid was, a contract signed 5 years later from McDavid. He could've gotten more. He could've waited closer to the offseason to bump towards 15% like Matthew's did.
Tkachuk and Stone at $9.5 are the highest paid wingers to win a cup. Everyone else is a C or D above that threshold. Avs clearly had a lot to consider in what Rantanen was worth, but he knew he wanted as much as he could and it was higher than the Avs would go. The last time that happened to the Avs was O'Reilly, this core never really knew ROR. So now they've gotten their own dose of what happens when you want more than the team will give you.