Phaneuf isn't very good defensively.
There isn't an argument that is valid suggesting he is. The advanced stats argument is that he plays against top competition.
Well guess what:
If you dig deeper into the stats, as some of the prominent adv stats guys have, Phaneuf gets absolutely destroyed by that tough competition and in reality, playing against top competition is overstated in importance. It averages itself out to a point where there is a difference, but not a ridiculously high one. (Even if Carlyle is a line-matching goon).
And hell, when he's matched up against average competition he gets destroyed as well.
He puts up a decent amount of points, but isn't great defensively and shouldn't be on the team's first pairing let alone making that much money.
If you're a believer in adv stats and have been led to believe Phaneuf is good defensively given his situation, I encourage you to read this.
http://hockey-graphs.com/2014/01/06...-players-stats-toronto-maple-leafs-d-edition/
Note: It is not my piece, merely a well-done piece by someone else.