Their wattles should still remain a dark mulberry color. In the picture I posted of my pullet at bath time showing you her comb-- you can see her wattles under her break are nearly non-existent. That is how it should be for bearded females. My roosters have bigger wattles-- but not by much. They are not visible through their beards at all. I have a cockerel I showed and his wattles are a bit on the red side-- even though his comb is perfectly dark mulberry-- NO red. The judge told me that his red wattles were undesirable-- and even at that, they really aren't too red. This judge went thru every bird like that-- pulling back feathers to see hidden faults. I'm not sure if the red color you are seeing is bad genetics and undesirable or because they are maturing-- this would be a good one for Sonoran since she has dealt with more birds than I have. I never noticed any color change, but that might not say a whole lot! LOL Their skin and combs should stay dark.
I've no idea! Knowing I am personally breeding to try to better my birds and to show, I would never do that. I have a particular goal for my birds, and that seems counter productive.
I would imagine if it were done, you might get a mix of non and bearded. I wonder if that would weaken both genes in those birds though for those traits.