I'm all for getting a new PP coach.
With that said, I think most people here underestimated Shatty's loss for our PP. Our PP% was fine after he left last year, but most the goals we scored were against bad teams. We only scored 1 PP goal against playoff teams after the trade deadline last year and we had the worst PP in the playoffs. For all the "he's just a PP specialist" talk about Shatty, I think we all may have overlooked how valuable that can be. I think the PP structure is a bigger issue than the personnel, but Petro/Parayko/Dunn have not been able to execute as well as Shatty did.
I'm not saying that it was a mistake to trade him or that we should have made an absurd offer to keep him. But I do think that losing him is as big an issue for this season's PP as our overall structure.
Losing Shattenkirk was absolutely 100% a huge loss for our PP. Shatty is a special player with the man advantage, one of the best in the world.
However, here's why I am not willing to cut the Blues much slack based on losing Shatty: I haven't noticed any real changes to our PP in terms of structure/set up or any improvement in our PP as the season has gone on. Perhaps I have missed some changes or am not giving the coaching staff enough credit, that's totally possible. There has been some personnel shuffling (Steen away from then back to the point for instance), but no discernible improvement in our PP% all year.
It's not like we don't have enough talent on this team to put together a solid PP group, I don't buy the idea that our PP personnel are the 30th best in the league (I say this rhetorically, not saying anyone has claimed our PP personnel are the 30th best in the league). Pietrangelo/Parayko/Dunn are not as good as Shattenkirk on the PP, but they are all varying degrees of capable. I note that we have good players in order to point out that at some point the onus is on the coaching staff to figure it out and deploy a PP system that works given our current roster...and they just have not done this IMO. Losing Shatty definitely hurt, but it shouldn't have hurt THIS bad.