The story would have been all about Antonia and her life experiences instead of Jim Burden's.
She is very effective. Jim does sound like a man writing and he does not sound like a woman at all.
I think he changed the title because he felf like he was very close to Antonia, that maybe at one time, he thought they were a couple, they were close friends, and he always did things for her.
Based on this information, I reccomend My Antonia to anyone who likes old western living books.