If this was about the insult of an initial offer (likely we can't pay you that and still afford to go after another top 6 forward (who, by the way, we're going to pay more than you)), just think about what he's done: uprooted 4 kids in school, move his family to a different country, not re-engaging Bryan Murray in a direct, matter of fact, lay all the cards on the table discussion until the die was cast......all within a matter of days.
Either a knee jerk overreaction (I'll show them...) by a proud athlete, or this had been simmering below the surface for a long while.
Contrast with Martin Brodeur who's been criticized by his peers for taking team friendly contracts his whole career. Flirted with free agency last year when the Devils made an initial lower offer but decided to re-up with the Devils. Devils increased their initial offer when they saw the competition. I doubt he regrets not signing with the Leafs.