I've not played with White Moon, but if you like Many Vs 1 games, then consider Black Secret.
That's what appeals. I've not played anything like that yet. Even if one side habitually wins, a games group can take it in turns and see WHO can break that streak.
I just wondered if anyone had any inside knowledge -there do appear to be many people dissatisfied with the slightly larger cards available so a new edition could enable the cards to be reprinted and sold on their own for a small charge.
As for the expansion being unpopular -well a geekrating of 7.64 for an expansion with slightly oversized cards doesn't exactly imply a turkey...