The KKK lets in Black people now, so I'd say they're changing for the better, really.
There are two points to understand here. First there is not one organization that calls its self the Klan. Rather there are multiple organizations that call themselves the Klan, and there is no continuity with the original organization founded in the wake of the Civil War. Second this so called Klan which accepts Black members is an isolated phenomena.
John Abarr, a Montana Klansman who claims to have given up the idea of white supremacy, has created yet another KKK grouplet. It's called the Rocky Mountain Knights, and he says he's opening its doors to minorities. There are no signs that any have actually joined.
Today's Klansman are the same as they have been for decades. They are a group of folks motivated largely by their hatreds. So, no they are not changing for the better