Marner is a dynamic, talented super-star with Hall of Fame potential. The Toronto Maple Leafs are definitely a better team with him, than without him.
Normally most group 2 free-agents have little negotiating leverage. Short of being willing to sit out games, they don’t have a lot of options.
If Dreger is right in his report that the Marner camp wants to take negotiations beyond July 1st, then the Marner camp clearly thinks the threat of an offersheet is their leverage.
Only problem: offer sheets are practically extinct, and anyone giving Marner an offer sheet will give themselves a bad contract with no first round ELC players available for four years to offset it.