What happens if you cross breed neocaridina? Do the colors blend? Are the results randomly one color or the other? Are there splotches of the different colors? Do they start going back to the more naturally occurring coloration?
When you mix the colors the pigments blend (as in both appear on the same shrimp) but unless you have two perfect shrimp with only one color pigment each (highly unlikely), the result is similar to the wild color. Some people like them, some don't. I guess it depends on what look you want your tank to have.