Centuries of happy heterosexual couples managed that power dynamic quite well. We've only been out in the open for about a couple of decades. Give us a chance to chart our own waters. The fact that a physical strength difference doesn't generally enter into the equation for gay couples already alters the situation. I thought it was pretty darn romantic, and I like both characters. AND it had nothing to do with the James Girls!
As others have posted, given the history, the family struggle didn't make much sense. Maddie should be emancipated still and not subject to a guardian decision, and Daphne would probably fall under the care of her Aunt or father. It makes zero sense that Rayna wouldn't have set up a plan. She was not an average person. She should have lawyers handling all that stuff. She and Deacon both traveled a great deal, the girls have different fathers, one in prison. It's not the average we'll-get-around-to-this-later deal. Heck, I just drew up a will and I barely own more than a bike and a computer or two.
That said, it might be fun to have Teddy move in and he and Deacon can be "My Two Dads" for the girls.