Standard would be impossible since colors, blushing and pattern can be so variable and unpredictable.

Simple example the dog standards allowing a certain percentage of certain coloration could never apply in the snake world, simple example a pied, whose to say it should be 50% white? That would make everything else not standard and therefor rejected?

Registry in all honesty I could not really care less, yes there has been a corn registry for years they even plan to add BP soon according to their site, however people need to ask themselves the question: who uses that website, do buyers REALLY care if so how many do? Would it be worth the time and money for a breeder? Would it even be possible for large scale breeder to do so?