Having part of your body in the crease does not mean that all of your body is considered in the crease. Having your skates/legs/torso in the crease does not give your arms the protection of being "in the crease" when they are extended well outside the border of the crease. As a goalie, if you have active hands that are 18 inches in front of your body and your body is at the top of the crease, your hands don't get protected as in the crease. That's the trade off to playing aggressively at the top of the crease. You have to deal with contact from players not entering your crease.
Binner's ability to move within his crease was not impaired. The contact was incidental and occurred out of the crease. Crosby established and committed to his path moving in front of the crease before Binner began reaching forward outside of his crease. He also has Mikkola draped over him preventing him from moving further away from the crease. Crosby actually starts his path toward the goal down lower and is drifting up toward the point as he is driving the net. Mikkola is trying to establish body position and prevents him from going any higher. Mikkola's legs are straddling Crosby while Mikkola is backing him toward the goal at the time of contact.
Crosby has every right to go to that area of the ice and he started his path there well before the initial shot is taken. He is arriving as the puck gets there. Mikkola prevents him from taking a path higher up and is backing him toward Binner. Crosby still avoids contact within the crease and all contact is incidental. It was absolutely not goalie interference.
It's absolutely not a penalty but you can't run into a goalie and make him drop a puck and then score, inside or outside of the crease. It should have been deemed no goal and had a face off with no penalty since it was incidental contact.