So again it seems like there just is no room in your comic world for any new characters who are diverse and no changes to the existing ones either. So tough luck to everybody that does not think like you.
Never have I said that. In fact I said making NEW characters was the way to introduce your "diversity" if it must be introduced at all.
Frankly, I detest the notion that a person's heroes must be of the same race/ethnicity/etc of themselves to begin with. The idea that a black can only look up to black heroes is racist and insulting at it's core.
For the record changing a character drastically would not be my first choice but when you are dealing with DC they basically got no choice because almost all their heroes are white males.