Im kinda mixed on it. It has its benifits to be split, but also its kind of not in keeping with the "longarm" area either. With the Semi, bolt/lever/pump, and general forums for rifles, it in turn makes the shotgun area, with its single subforum, seem confusing.
I think either both the rifle and shotgun forums should be split in some similar way, or not. Makes for an easier way to search or just browse.