I just came upon this thread yesterday, and I have found your observations of Slugger and Blanch and their offspring very interesting. Your account really highlights how flexible the rooster's behavior can be depending on the current social structure of the group.
I have noticed an interesting behavior pattern of one of my game roosters over the past few months. He shares a coop and yard with a lone hen who is about 5 years old and lays sporadically. She has a pattern now where she lays eggs regularly about every other day for a month or so and then she will stop laying for a couple months. I noticed that the rooster stopped tid bitting and giving her treats a while back. It was noteworthy because when he had multiple hens he never kept a treat for himself. Several weeks ago he started consistently passing the treats the hen again. I wondered if she was laying again, but their were no eggs to be seen. Then this past week she began laying eggs again. I'm not sure if or how he perceives that she will start laying, but it is interesting.
I have another lone pair of five and a half year olds where the rooster stopped sharing the treats with the hen, and when I first noticed I thought it he was just a cranky old rooster. But then I realized there wasn't much biological advantage to sharing treats with a hen who wasn't laying.