glad i'm not much of a fan of this band. i'd be pretty disappointed to hear that they were taking studio time to do christmas songs and not work on a serious album.
They put out a great record only about 8 months ago. I can't speak for all of their fans, but I'm totally okay with them taking a break to record an album's worth of stuff that I can still rock out to.
In fact, I think that's my favorite thing about their annual covers. While the melodies are all recognizable an well known, you still feel like you're getting a fresh ABR song. They really know how to make a song their own.