The PP ineffectiveness is the same reason for the 4 on 4 ineffectiveness is the same reason Dallas can score on rushes but not when cycling the puck.
Puck movement.
If I see one more pass to Sequin's skates I'm going to throw up.
One more no-look pass to a guy who isn't there: Puke.
One more "saucer" pass that lands with a puck rolling and bouncing over the stick of the guy supposed to be receiving it: Puke.
One more recipient coasting alongside a defender instead of hustling to the open ice to receive the puck: Puke.
People criticize this team for passing too much, especially on the power play, but it's because every pass is a bad one, and bad passes don't lead to good shots, so you simply see more bad passes.
Yeah, and the PP is moronic. Seguin should be our Ovechkin, period. He shouldn't be hustling to find creative ways for Daley to try to score.