That is what I was afraid of. The Mr. Beer WDA had a IBU of 60, and, although I can't find a site that the Cooper's Dark Ale IBU was quoted at, I remember it was in the 20s. To me that suggests the cooper's lacks that awesome hoppy bite that the Mr. Beer kit had. Obviously the IBU can't speak for the maltiness of the WDA, but it sounds like that was lacking as well.
Anyone have any idea which hops were used in the WDA? I would guess something like Northern Brewer, Fuggles, and Styrian Golding or something in that general category of hops.
Of course, waiting a month or two may change things, but the above post is not promising.