So, I know I'm coming late to the party, but I only saw the movie recently. However, after scanning through the Domain selections, I have exactly one question:
If I saw your choices correctly, you've made this a Start story.
From the very first scene, I could see nothing but a Stop story.
She needs to stop rejecting every idea thrown her away, stop pushing people away, stop blaming herself, etc. She absolutely had a chip on her shoulder, which is why she was always argumentative.
Like I said, though, I only scanned the thread. If the Domains are creating a Start story, then that should be explained. As, I don't see how such an arrangement could make sense.
All that being said, with the Stop story, this is the layout that I see:
Objective Story: Psychology
I like the Dysfunction Family motif for the OS. I think you guys covered this extremely well in the posts, now that I've gotten a chance to read them. In addition, it carries through both past and present.
Relationship Story: Physics
For the RS, it makes more sense for that to be the relationship between Ginty and Travers in the past, which is finally resolved in the present. (Complemented by the one with Ralph, of course.) Altogether, I think you have it right, though, that it was the activities that brought them closer together, and at times, started to break them apart. Her father drinking, for example, his tantrum at the bank, his encouraging the imagination and joining in with her.
Main Character: Mind
For this to be a Stop story, then, I would have to say that Mrs. Travers angst and personal problems are driven from her Mind. (Litmus Test: If we give her new stuff or resolve her money problems, she'd still have her angst; however, once she signs the papers and lets go, her angst is removed. It's that letting go that matters for her.) The most telling scene for me was when she threw the pears out the window. That was a clear indication that her problem was something deeper than money, deeper than her current situation.
Influence Character: Universe
This leaves the Influence character throughline as Universe: Disney -- His Universe that he has created pushes and presses heavily on Mrs. Travers and forces her to face her demons. He doesn't even have to try. Being who he is, and having established what he has established is enough. Actually, he even leans into this in the "you and I" moment at the end when he is relating his personal story to her, explaining that his situation isn't or wasn't so different from hers.