That zone setup isn't what we saw the Blues using in this game, either in the first two periods or in the third after they made a few adjustments.
I think a PP needs two basic things to have a chance at being effective:
1) An effective strategy for entering the zone. What I'm seeing from the Blues here is reasonable layering through the neutral zone, but everything jams up at the blue line as the decision to carry or dump is delayed until the puck carrier hits the line. Unfortunately, all his support has usually come to a screeching halt by the time the decision is made, so neither option is particularly effective. The puck carrier needs to make a decision earlier after crossing the red line. If the defense is standing up, dump it deep while your forwards still have the speed and skating line combo to win the race to it. If the defense is hanging back, the support forwards need to start moving laterally across the blue line with some momentum as the puck carrier approaches it. This forces the defense to either back off a bit to respect their speed if they're staying still laterally, or move with the man laterally which creates gaps in the defense that the puck carrier can use to cross the line. If the defense does neither, a quick pass to one of the moving forwards should net him an easy entry and potential scoring chance. Last ditch option should be a soft half-wall dump to an open area that one of the moving forwards can reach quickly.
2) A zone setup that applies pressure to the defense in multiple ways while playing to the strengths of the offensive personnel. There are a lot of ways to do this. The basic tools in the offensive toolbox are one-timers, cross-ice passes, charges to the middle from the half-wall, screens, intentional shot redirections, changing the attack angle from high-to-low or side-to-side quickly (i.e. sharp puck movement to create defensive gaps in coverage or open shooting lanes), backdoor plays, rotational movement, etc. The big question then becomes what sort of personnel groupings and positionings maximize those options while playing to the strengths of the individual players?
Generally, I like having a two player presence in the slot (one medium/high, and one low) when the puck is on a half-wall or in the corner (threatening to carry it into the middle if the opportunity is there), with the weak side point applying backside pressure and the other point providing an outlet that allows him a one-time opportunity. When the puck is high, I like an umbrella formation with two forwards rotating around in the low slot/around the net. We saw some of this from the Blues in the first two periods, but the personnel was not optimized to take advantage of the opportunities these formations provide. An example was Steen on the left point. His most dangerous weapon is his shot, but this is not a position that allows him to shoot quickly before the defense can rotate. In the third period he was moved to the right point/half-wall position, and this was fine.
There are a lot of things to nitpick here depending on personal preference, and I don't have time to go into all of them. I do think that the rapid diagnosis of some of the problems and willingness to adjust bodes well moving forward. To me the biggest concern is the zone entry strategy as outline above.