Blum had a few different chances to get the puck on his stick and failed to do so.
And regardless of that, Franson had no business leaving his man wide open. Let Pekka make the save as opposed to not having a chance. I'd rather the guy take a shot from out wide than a guy in the slot all alone.
How is any of that on Blum? He keeps him to the outside and Franson leaves his man wide open in the slot. Franson made the bad move going to help Blum and left his man alone. That is all Franson.
Blum has full body position on his man and gets striped from behind. The canucks didn't enter the zone with possesion. Hansen chips it in and Blum is slow to get to it. Why would Franson be covering a man if he's anticipating Blum will have possession of the puck? If anything he's thinking about making himself an outlet.