I will admit that I don't know much about WMMA.
So as a "casual fan" for WMMA, I don't know who these chicks are that they are lining up to fight RR and I don't care about any of them. They could be very accomplished fighters who totally deserve a title shot.
However, I remember Cyborg dismantling Gina back in the day and my impression is that she is the one woman who is widely seen as being competitive with RR.
So... until that fight gets booked or somebody convinces me that there is another real challenger out there, watching a WMMA title fight is a pass for me.