The face value of Nylander's AAV this year is $10m. But because he signed with the regular season slightly over 30% completed, the actual cap space used this season is...wait for it...$6.96M...the same as his cap AAV for years 2-6.
Nope. Nylander gets just under $7m of his $10m salary this season. If you include the $2m signing bonus he'll make just under $9m. Either way, he's set to make roughly $41.9m over his 6 year contract, an average of $6.96m per season.
His actual take home pay is $6.96m on average. Exactly the same as his cap AAV.
There is no loophole.