Two problems and my opinion on how to correct it,
1. lack of movement by players without the puck - some of the best PP has a playmaker behind the net and players moving around to get the pass and then either a shot or quick pass to the opposite side of the ice for a shot with the goalie movin. We need to get the goalies moving side to side before the shot
2. Lack of big body in front of net - Noesen sort of fits the bill, but often his goals come from the side of the net. Put a big body, like Staal or Slavin right in front of the goalie then quick puck movement will have the goalie reacting late or not seeing the puck at all, also. Those two are good at tipping the puck, which leads to more goals
Being a net front presence is more than being a big body. An effective net front presence has to be able to anticipate where the shot is coming from, have quick enough feet to move to the right spot without getting pushed around, have good hand/eye coordination, anticipate where a rebound is going, and be able to get to the rebound 1st and have the hands to put it home. Staal is a "big body", but he doesn't have most of those other attributes. We've tried him there in the past and he's not been overly effective because his hands aren't good enough.
I've suggested Slavin in the past, but the drawback there is the guy in that role takes a pounding. Do we want our 20+ min / night top pairing defensemen to spend another 4 min / game getting the shit beat out of him in front of the net? I think the negatives might outweigh the positives.
Noesen is the best we've got right now, but he's not in the same category offensively as guys like Kreider, Hyman, Bergeron, Tavares, etc...
Not every team that is successful on the PP has that guy though. TBL doesn't really. When I watch the Sabres, they often use Skinner in that role. Vancouver doesn't have that big net front guy either.