Your point 5 seems to get to the heart of the entire issue. Why insist on calling her the Mother of God if there is so much chance for misinterpretation, particularly when there is no scriptural mandate for us to address her in such a fashion? The term Mother of Jesus captures the same idea without the potential theological baggage.
It does have a huge interpretive and explanatory hurdle to cross, so Mother of Jesus is more immediately clear.
If someone were to want to emphasize how important in the earth’s salvation history that Mary was, they would be hard pressed to find a better way to emphasize that than FORCING people to think about this exact theology.
She is important. All generations will call her blessed. The bible reveals that when Jesus’ other followers had fled, that His mom was still there for him. There at every point of conception, life, death, burial, resurrection.
She was an amazing woman. I have no doubt that Jesus deeply loved His mom.