I thought the PK was really impressive despite giving up a goal. That Avs team is so polished on the man advantage and the Bruins did a fantastic job keeping the pressure on and limiting chances. Also (for the most part), they were making the smart play and getting the puck down the ice when they had the chance.
Still, even strength defensive game both in terms of coverage (loose) and puck movement (bad) leaves a lot to be desired. Both the stay-at-home and more mobile defenders seem to be struggling at the moment. They need to get better coming out of their own end. This was a huge issue in the playoffs and it remains one now.
The quick up out of the back end was a huge part of their success early last season. I really struggle to understand why that's gone by the wayside and they struggle so consistenly against so many opponents.