Actually, Chris at Gulf Coast Reptiles produced an Axanthic Black Pastel, and it was a darn good looking animal. He actually has some Black Pastel Het Axanthics for sale right now. With that said, it is one of those projects that sometimes doesn't have to go to the end (i.e. the Super Black Pastel or Cinny form), but has a middle of the road form that looks great.
Another great example of this is one of my favorite snakes in my collection. The Hypo Mojave is an astounding looking animal, however, the Hypo gene doesn't do much to the Super Mojave that makes it strikingly different.
Just my .02,