That’s a good idea, to use the ‘Ben’ yell.
You’re right that there should really be something more to indicate Leia healing her son. I don’t think that any of the three cut shots of her in the cave would help explain the healing, since two of them are her holding a medallion and the other one is just her in silhouette. Maybe a ghostly hand appearing over his wound as it heals? That would require some work, but that and the Maz word replacement are really small potatoes for a change this substantial.
In fact, either the word replacement or the ghost hand would probably be sufficient on its own, though both would be ideal.