You keep referencing "since Marner came into the league". Well to the best of my memory, when Mitch was younger and less figured out, his PP unit with Bozak JVR and Kadri was incredibly potent and ran like clockwork.
We've discussed since he came into the league, and we've discussed the past 3 years. Marner has helped elevate every PP unit he's been on in his career to be incredibly potent, and this idea that he's "figured out" now is ridiculous and completely baseless. Once again, our PP was rolling before Marner's injury as well.
But in the era of our stacked PP unit, he's gotten predictable, teams frequently just give him space and are happy to let him shoot because he poses no threat, which makes it a lot harder for a guy like Matthews to get wide open.
I know this is the narrative because everybody loves to dump on Marner, but none of this is true. He's not predictable; he's capable of making some of the most unpredictable plays in the entire league. There's nothing abnormal about the placement of PKs and the available space that Marner gets.
Matthews does not have trouble getting open; he's the 2nd best PP goal scorer in the league since the stacked unit came together, only barely behind the guy getting passes from McDavid (and probably would be ahead if not for his wrist injury last year). And if Matthews is being extensively covered, we have multiple other elite goal scorers as available passing options.
Teams are not in a hurry to allow anybody to get shots from prime scoring locations, and Marner shoots the least of any forward on the top unit, so PKs are doing a pretty bad job if that's their plan.
If you only look at his PP production over the last 2 seasons, how does it compare to his first 2? And if it's worse, isn't that cause for concern considering the players he's playing with are better?
Not particularly. I mean, the PP unit he ran in his 2nd season was one of the best generating and best producing PP units in the modern era, so that's a pretty high bar. Pretty much everybody's PP production is lower over the past 2 years, because the PP went through a really cold stretch last year - that seems to be all anybody can remember.
I get the idea that generally, better players = more production, but when we're talking about the PP, while such things will increase the production of the unit, it will not always increase the production of everybody on it, because the unit is less reliant on any one individual. Bigger pie, but split up more evenly. His IPP has dropped quite a bit from his earlier years.
PP production is also inherently variable. A high-producing small sample. A hot streak or cold streak here or there can make a substantial difference.
And if we're talking about goal-scoring exclusively (for some weird reason), having 3 elite goal-scorers on his unit is only going to decrease his individual goal production, because that's not going to be the role he's set up for, for good reason.
Quite frankly, I don't see any reason we shouldn't have a top 3 PP every year
No team has had a top-3 PP every year since Marner came into the league. This is part of the inherent variability of PP production. We're actually tied with Edmonton for most top-3 PP placements since 2016, and we're the 4th best overall since then (0.1% behind 3rd). This while not maximizing our team on the PP like many others - either splitting our best players, or stacking our best players and then only playing them for half of a PP, for some illogical reason.
I watch hockey pretty obsessively, and the looks that our top PP has generated for most the past 2 years are not as rosy as the expected goals numbers make them look.
That's really not true. Even the most obsessive watchers are subject to normal biases, and your perceptions on the quality of opportunities will be affected quite substantially by whether or not the puck actually goes in. We can even see this by all of the people claiming that we've been scoring off these amazing super duper chances over the past couple weeks, when in reality, most of our PP goals over the past couple weeks have largely come off of pretty normal stuff we've been doing the entire time - they just happened to go in at an unsustainable rate over this stretch.
There were about 5 games this year where our PP actually looked incredible with Mitch when all 5 players were moving around more and getting him more involved below the goal line, but this hasn't been the case for most of the previous 2 years.
But that's not true. It only wasn't the case for a 20-30 game stretch last year, which was a collective issue, not a Marner issue, even though people love to arbitrarily blame that stretch on Marner. Any issue anybody has with how the top unit runs at any point in time, and they just blame it all on Marner.
Every player on the PP should have the ability to score.
Marner does have the ability to score. PP goal-scoring comparables since he entered the league include the likes of Kane, Larkin, Couturier, Backstrom, Kuznetsov, Kopitar, Gaudreau, Spezza, Giroux, Toews, Svechnikov, Wheeler. It's just not his specialty, and he doesn't have that role on our PP because we have 3 other elite goal scorers on it, who should be taking the majority of shots. There's nothing wrong with having somebody who is primarily a playmaker on a PP. The only thing that matters is that the unit scores - not who does it. Marner helps the unit score.
With Marner on the PP if Matthews goes cold or the opposition focuses on him that takes 2 players out of the equation
What are you even talking about? How does that take 2 players out of the equation? Marner can do more than pass to Matthews (and I'm not sure how you're blaming Marner if Matthews goes cold...), and Matthews can do more than just shoot Marner passes.