Pipelines move things. This is more of a college defensemen tailings pond. And I think the real issue is that almost all of these guys carry the dreaded "PMD" tag - not Miller, but almost all of the others.
I used to like the impression of a working strategy behind this, but like a few other elements of PC's player acquisition game plan, I have my doubts now. I liked the moves to scoop Boychuk and McQuaid from other teams' rosters when the Bruins' cupboard was bare at almost every level (ah, the days of Tanabe, Mara, Brad Stuart, Jurcina, Dempsey, Alberts...). In Providence, the top "prospects" were guys like Lashoff, Bobby Allen, Marc Stuart and Jon Sigalet. Only Stuart became an NHL player. They were still seriously hampered by the lack of return on high end D picks in the first half the decade - Jonsson, Makela, Morrisonn - the limitations of Stuart, and failure of Lashoff. Then they tried to address the lack of depth in the draft with Alexandrov and the disaster of 2007 with Cross, Reul, Goulet and Ostracil. They needed to go to plan B to rebuild the blueline at both levels.
So you pluck from other teams for modest prices and put new guys into a system where they have more opportunity. You overshop and hope the best rise more quickly due to competition. The problem is that the plan has failed in almost every respect. Hunwick was homegrown, but he couldn't match his first year and had to go. Kampfer also couldn't play consistently - gone. Warsofsky led the P-Bruins D in scoring with a whopping 29 points last year (Boychuk had 65 his last year in Providence and he hasn't exactly lit up the NHL). Colby Cohen was supposed to be the other half of Shattenkirk and he was sixth among P-Bruin D last year behind Bodnarchuk, a guy who will never be an offensive defenseman. None of these guys had a shot at making the NHL this year except maybe Krug, but the best you can say about him is that the jury is still out.
Oh, yeah, and Providence has stunk for years. So they have a lot of defensemen who aren't turning out the way they hoped. Time to change tack and maybe tweak the strategy - go back to the Junior trained guys you can pluck off of other rosters for, say, a couple of undersized but skilled! NCAA guys.