I don't have to tell allot of people here, I am a Locke & Key superfan!
Currently, I'm even trying to find a Yankee craftsman to build me a "Ghost Door" and frame for my comic room .
But, I hear you. I wasn't the biggest fan of the first volume's #5-6 and Head Games #5 myself, once we lost focus on the Locke children. But upon reading all 12 books together again, once Head Games wrapped, I got it more. Joe Hill is a novelist, and he is writing Locke & Key like one giant novel. When this story is complete all the little details Joe and Gabriel put in it throughout since get go, even in parts that "dragged", will make total sense.
I for one, believe because how importantly it was written and illustrated, Locke & Key: Crown of Shadows #2 will become an eventual Modern Age "key" myself. The series has had some great issues in the past, but none has ever taken the reader on the emotional rollercoaster COS #2 did. It's unique form of storytelling in that issue will be a major influence in writing in 2010 and beyond, IMHO.