Did Cole receive the appropriate punishment for his crime? Explain why or why not.

Are you referring to Cole's time on the Alaskan Island? I think from a thematic point of view, Cole's punishment was entirely appropriate: it is what Cole needed more than anything. Banishment to the island gave Cole the hardship, reflection time, and emotional awakening to actually change as a person. Cole was able to understand his anger by being emotionally and physically stripped of all his old "baggage".