The law is clear and does not need changing.
The only thing a jury has to decide is did it happen, or didn't it?
We don't need a law change, we need a culture change. And everyone needs to work together to achieve this. A defendant is tried by a jury of his peers. This means ordinary people like me or you. Changing rape culture doesn't just mean changing the mind of a potential rapist, it means changing the minds of everyone who might end up on a jury one day.