I remember reading that the Black Pastels had multiple lines shipped in from Africa and each is different in its own way, its not just about entirely new morphs, it's also about increasing the genetic lines of pre-existing morphs. I believe that something similar has happened with Lessers, where aside from the Platinum purchased by Ralph Davis there were also other wild Lessers which could be new genetic lines shipped in.
Look at the different Ghosts as well, there are a handful of different lines of them, some arent even compatible with others.
I'm not saying "hey lets go out with Ball Python catching machines and dig up every last Ball in Africa and ship it here" I'm just saying lets not stop all imports entirely just because hey we have a lot already.
Its definitely good to see that pet stores aren't taking WC animals anymore and almost exclusively sell CB animals now.