It seems to me that there have been fewer reviews for all of Dwarrowdelf. Not sure why.
My guess is it's simply due to the volume of packs that have come out recently. Once they got into their standard monthly release schedule, I know I personally found I didn't have the time to play them each enough that I felt I could offer a good review of them.
I haven't purchased this pack yet, so I can't help with even a few words on it.