It's not the defense, it's the goaltending.
BC shots on goal are slightly down from last season, shot % is slightly down too, but nothing scary. (You can argue that the start of this season had weaker opponents then last season taken as a whole, and that's true, but I don't think it's the main problem).
Opponents shots on goal are basically the same, but opponent shot % is up from .08 to .1.
Code:
BC Opponent
SOG/Game Goals/Game SOG% SOG/Game Goals/Game SOG%
12-13 38.14 4.30 0.11 25.16 2.00 0.08
13-14 35.44 3.89 0.11 25.22 2.56 0.10
The good thing is that it's mainly the goaltending, and if Boyles can get back up to her .927 from last season, or if Miller can get back up to her .905, then we're good. The bad thing is, what if they can't?
Obviously there's an issue of scoring consistency as well -- but even against Syracuse and UNH, there were plenty of shots on goal, just a lot of them got saved.