Not necessarily saying this is an incorrect take, but there are things that should be considered when talking about this sort of thing.
First of all, Ranger fans are generally harder on Ranger players than other teams' players. The reason is pretty obvious. When a Rangers d-man makes a mistake for example, it's bad for a Rangers fan. When another team's player makes a mistake, it's good for us. Look at the way this forum beats up on any number of our own players at any given time. Maybe Pionk played in a way where, to NYR fans, he's "the worst d-man in the league" but if he were on another team he'd just be another of many below average d-men being asked to do too much. In one situation his play is meaningful to us, in the other it's not.
Namestnikov is scoring more despite still not playing with a ton of talent. But is he playing more minutes? Being put in more offensive situations? It's been 10 or so games, is he riding an unsustainable shooting percentage? Is it reasonable to expect this production to continue over a whole season?
It seems like you're really oversimplifying this. People said these guys were bad here, now people say they're not as bad on other teams. The coaches are different, must be the coaches making the difference. Maybe it is, maybe it isn't. An argument can be made depending on what the data says and can be validated or not over more time.