what is disturbing to me is a radical change. I can see the additions of Martin Luther King Jr and maybe a Susan B Anthony or Eleanor Roosevelt phased in because I think that gives representation but the sheer amount of change to several women who I and probably most people have never heard of seems a bit of an overkill and agenda pushing
The fact that you don't know of Harriet Tubman means you probably didn't pay attention in grade school and would do very poorly on "are you smarter than a 5th grader." Ask any 5th grader who she is and they will know. Your lack of knowledge shouldn't be the bar for the us gov.