I agree with the fact that our D-core is not good right now, however this may be part of the growing pain we are going through with so many young and inexperienced defencemen.
It is part of the rebuild that we have been going through the last two seasons in my opinion, but with the help of Kuda and Gonchar; Karlsson winning the Norris, and other guys like Benoit helping out along with some good fortunate last season and defensive system, the real problems have not been exposed as much.
Now we are finally here, you are seeing an aging Philips and Corvo; young players like Cowen and Wier still learning how to play at this level; Gryba and Boro are honestly 5-6 D at best of times, Karlsson still trying to find his Norris form. The only guy has been somewhat consistent is Methot, and it should be, as he is at his prime as a player.
In the offseason, BM did not have the money to spend on a top 4 D, now we are left with what we have. If everything worked out, then we have a solid D-core, but as of now, they are underachieving, and it does not help that the overall team defensive effort has been very inconsistent.
We either stay patient, or make a trade that we can not afford moneywise. B. Campbell looks good, but contract sucks. Erhoff will help, contract no good.
However, I think we can pull a trade like Chi did with Oduya. That is the type of guy we need.