Letestu was tied for 12th in the NHL in PP goals last season. This season he is tied for 2nd on the team in PP points (Lucic and RNH are tied with him and did it in less time). He leads the team in shots on the PP with 29 only Klefbom is close to him with 28, McDavid is the next closest at 19 followed by RNH & Draisaitl at 18. Our PP seems to lack in terms of willing shooters and Letestu seems quite willing and he has the added utility of being able to win a draw.
I understand the sentiment of our PP isn't good enough yell at the 4th liner cause he shouldn't be out there, but if you are making your judgement purely based on results based evidence, Letestu isn't the weak link on the PP, oddly enough this season it is Draisaitl. If you want goat horns for the 2nd unit, they seem most fitting on Maroon of the regular 2nd unit PP guys.
Our PP looks good when we are in constant movement and getting the PKers moving with us, but we have a tendency to being stagnant and overpassing on the perimeter and that blame should fall on Woodcroft. Though one good thing to say about the Woodcroft PP is we seem to gain zone entry with possession really often, it's the decisions, plays, and execution afterwards that are frustrating.
I also don't know how many times I've said this, but my understanding is Woodcroft is responsible for the PP and Johnson is responsible for running the defense and the PK, does anyone have an article stating that Woodcroft is the main culprit responsible for the PK. I'm also not sure why McLellan and Woodcroft always shoulder the blame and no one ever discusses Johnson or Herbers.