That's a big improovement!
She looks fabulous. For my personal taste, her nose is a bit long, but I am married anyway
Before more details on her, I would think about the story telling.
If I wouldn't know the picture, I hardly could recognize that she looks out of a train.
But story wise it is a very big difference as the train story says much more than a normal climpse out of a window.
Is it a farewell for lifetime, a curious view on a new location, on a new life? Is she looking for someone not seen for a long time as she was far away???
I would focus in that now. Maybe you have to extend your canvas to show a meta sign for a train? Some kind of symbol. Maybe it's just enough to make the window frame more clear and curtain too?
Maybe you just call it finished, as it is a good portrait already?