You reek of hometown Bias, with no real insight other than you watch pittsburgh games good for you. I love your logic, what you are describing is Dumo progressing and establishing himself, but for some reason you can't comprehend regression when it comes to Pouliot, and that year after year he major flaw in his game is that he is not defensively responsible and needs to improve, and he has not done that, so keep talking.
"reek of hometown bias"
So I'm biased for calling you out for talking out of your ass without having any idea what you're saying? Okay. Go watch some Pens games before you make dumb and uninformed comments on them.
Pouliot hasn't regressed, there you go spouting off nonsense again. Again, if you've never even seen Dumoulin play, then why are you commenting on how Pouliot has played? You obviously have shown that you have no idea with the talent level of the Penguins defensemen, so why are you acting like you actually watch them? If you would actually watch them, you'd realize that Pouliot's issues aren't "he's not defensively responsible", rather that he's inconsistent on a game to game basis. You'd also realize that he's not playing because the Penguins have an extremely deep defense, which perfectly explains his inconsistencies when you consider he doesn't usually play for long stretches of games. At absolute worst, you could argue he has stagnated, but "regression" is blatantly false.
Again, go watch some Penguins games or stop talking like you have any sort of idea what their situation is. You obviously have no idea of anything with regards to the Penguins defense, so go watch them or stop acting like you actually have watched them.