They run into the same pitfalls that a lot of analytics does. Namely, they put far too much stock into the equality of the league; there is this idea that all shots are created equal. That all shooters are created equal. That all shot setups are created equal. This kind of analysis fundamentally undervalues a player like Draisaitl who is just better than everyone else... better at shooting, better at passing, better at drawing pressure. Idk there is this weird Idea that like the only thing that matters is how much effect you have on possessing the puck and creating scoring chances. But... why do scoring chances matter? Scoring chances are only correlated in goals in a fantasy land where all shots are created equally... but they are clearly not. There isn't a single player in the league that would rather have Alexander Ovechkin waiting cross seam all alone on the powerplay to rip a one-tome from the left half wall than Victor Mete. But both of those chances are considered an identical chance with respect to Corsi, Scoring chance stats, fenwick, expected goals stats... It doesn't even matter if one pass is coming from McDavid and the other is coming from a guy like Cale Fleury who has zero assists after 41 games played.
Its asinine; they look at these stats that might make sense on median level players and apply them to a guy like Drai who is clearly on another level and it just makes them look so incredibly stupid. Its like... I dont care how many shot attempts the dude has, or what his expected goals for percentage is, because he's clearly an elite level talent that those stats have no value. It'd be like if you put McDavid in a Minor Midget game and he refused to shoot the puck until the other team got 10 shot attempts. His "analytics" would look awful, but like... so what? He would clearly be the best and most valuable player in his league and its not even close even though he probably only scores 4 goals a game.
Then these guys get all aroused at the prospect of being a contrarian and spit out some article on how based on the numbers a guy like Draisaitl is somehow not one of the best players in the league and they show there stats based on a simple bell curve, when it is clear as day that Draisaitl is so many standard deviations away from the mean in terms of raw ability that he wouldn't even be on the page of a standard bell curve graph.
And, as an additional plus, they undervalue special teams entirely, then straight up ignore the effect that game-planning for these elite level players has. No one is looking at Nichuskin on the white board before the game with his name circled while the coach goes over the plan for the teams 5 best possession players with the best goals for ratios to line up across from them all night every night. No coach is sitting down and telling his guys they need to pay the price to get at Kevin Hayes physically or the team will be in trouble. Just ludicrous when you sit down and see someone is even trying to compare players like that. Even you look at the Nucks and a guy like Elias Pettersson... he's not leading his team in scoring, and if you remove him entirely they have 5 guys within 20% of his production. To compare the star power a guy like that has on the game plan compared to a Draisaitl is absurd.
Dudes model has shown Alexander Ovechkin as a replacement level player on multiple occasions. Ridiculous.