A change in playing mentality, from what I've seen they've just gotten better at what they were already good at. Hard to put into words because I'm trying to describe my eye test for each one.
Jake's finished plays off the rush using his speed, which he was already good at. But he still tends to go invisible without the puck. Goldobin, while more active defensively is still a marshmallow in the board scrums. I don't see him willing to do the major grunt work required to win puck battles consistently. You don't have to be Chris Pronger to be physical.
Again, maybe they're letting up because it's pre-season but I don't think they're in a position to not be putting their foot on the gas pedal.