Like all this. I do see this path as evolving in a way similar to what you lay out. Makes a lot of sense. You're right - he doesn't have to be pathetic - cucks get something out of this too. There's no reason why the love can't still be there (unless of course you arrange the opposite yourself). Nothing wrong with humiliation though - it can and does play a role. I see it playing its part too - it's part of the kink that they both sign up to.
I agree, nothing wrong with the humiliation. Difference being, he asks for her to do certain things/treat him a certain way and she can get creative on how she interprets it. It also doesn't come from malice, but to give him what he wants and make him happy, even if it was something she doesn't understand yet or was initially shocked by.
The replay of her day seems to be a nice feature, it allows for me to have a better understanding of her character. It shows what her wants and desires are, and how she views you. Could be a valuable resource in helping making decision on where you want the story to go.
As a part of what they signed up for, it would be interesting to see what would happen with, for example a threesome. They add a guy to party with, but it ends up with the bull taking over and hubby not having much to contribute. The wife feels guilty, so she works on ways to get him more involved in the lovemaking, however the case may be.
A question if you like to chat on the forum, is their going to be any birth control/pregnancy concerns. I could see at the beginning where they eventually want to have a family together, being faithful and in love. But after going down the road of cucking, do they start to realize that the husband may make a great father and provider. But wonder if she should birth the cucks children, instead they might want to have the alpha bbc to be the biological father(ultimate cuckold finish), and raise it with or without him around. Now this decision could occur willingly or not. I mean by throes of passion, personal preferences, accident, or something else you can write.
No idea how long you going to run the story or completion on this project but I do wish you luck. Last question, is the only option for Patreon a monthly payment. I prefer to give something here and there when updates come out. Only because I supported others before and had no updates for months before having to cancel which always seems bitter. But I understand how you might like a steady payment versus never knowing when you might get support.