I don't think we need to save every single autosexing breed since some of them didn't have enough support to be a real breed anyways. Legbars are good enough for me. A lot of them just have two breeds as parents. A lot of breeds need more than two for parents though Australorps only had the Orpington.They’re auto sexing breeds that used the Barred Plymouth Rock as the dam in the first generation.
Autosexing breeds are too similar to each other to bother with.
This is just my opinion though. I hope you don't think I'm trying to be rude, but I think with all those breeds we'd be over our head.