I am not a breeder,
but here is what I kept thinking from the owners point of view, hope you don't mind.
I think having the chip registered to the breeder would be great IF the breeder has excellent records and keeps a relationship with the owner. What if the breeder stops breeding? Records are lost/destroyed?
Had Maddie's breeder been "ideal", and she wanted to keep the chip registered in her name I probably woouldn't have given it a second thought. However, what if something happened while on vaccation, or car accident and she was missing and turned up in a shelter? Would the breeder notify me when the dog was found? Or assume the worst and recover her? Just some thoughts I had.