Ronda is in the biggest MMA organization in the world. She doesn't need to "step up." But Cyborg certainly does. Shes the one who needs to make that cut. If not, the UFC doesn't need her. There is no 145 lb division. Then again, they could just give Ronda another free belt and call her champion of the 145 division as well.
As much as the UFC can sell Ronda, we all know Cyborg is the baddest female fighter on this planet regardless of where she fights. We can support and praise Ronda all we want, but at the end of the day everybody knows Cyborg is on a different level. This is what happens when you fight cyborg:
this is the last poster girl of women's mma after cyborg: