I have to respectfully disagree.
Yes the Atlantic is in a warm cycle, and may have affected one of the storms, however there was bad luck.
For instance if the big storm was a little weaker, it would have allowed the follow up wave to strengthen more and potentially give us snow.
If the northern stream wasn't so dominant (typical la Nina), the larger storm could have transferred to the coastal low and although hugging the coast and changing to rain, could have dropped a couple inches.
I do agree that the pattern was not epic, where people were comparing to 2010 due to the fact that, per the New England forum, the PAC was not as favorable as 2010 AND not to mention the negative NAO was not as strong as 2010. However, it was a Decent setup that I would take chances with again any December.
Last point, a warm Atlantic is not going to cause a storm to move from off the Delmarva to Canada. From off the coast to a coastal hugger or even an inland runner sure, but not a coastal to Canada.