My unsolicited opinion...
I don't mind more depth, big or small, but it does seem like this is nothing more than a depth move for Belleville, not a bad thing. Seems like there's just too many LD ahead of him no matter how he performs. Chabot, Brannstrom, Wolanin & Lajoie off the top of my head.
Getting Phaneuf was fixing their own mistakes, so not sure I would heap much praise on them for that move. I share the opinion that the long term consequences made it a poor move, even though there were some positives from it. We got the conference finals run with him on the team, so it's certainly a bit muddy, but if that hadn't happened, I see little argument that it wasn't a big mistake, even if it did clean up some of the previous messes.
Whether it's Phaneuf, the others they sent, our veteran core, one thing is for certain... this team loves to blow their money on role players, tweeners and over-the-hill vets. For a budget team, they sure do like to nickel and dime it away with reckless abandon.
In regards to size, I do think it still matters to a certain extent, but that speed and skill has surpassed its importance. I saw this as much more of an issue back in the early 2000's than our more recent playoff losses. If anything, I would say the massive difference in skill is what has had Pittsburgh sending us packing numerous times. We quite often looked like we flat out didn't belong on the ice with them. Against Anaheim we were exposed as a one line team and a backup caliber goalie as the starter.