I thought it was much more even than that. Anaheim was the more aggressive team in the third, but that was mostly because of penalty trouble, as you said.
Also, I think Edmonton was content to try and sit on a one-goal lead, knowing their defence was very capable of denying the Ducks many good scoring chances, and Roloson was good enough to keep any chances they did get out of the net. It was the same strategy Buffalo employed against Ottawa after game 1 of that series, to great success.