What are you talking about, watching Rousey get KTFO again by Holm is my raison d'être. All the more reason to make that fight if she can't beat Holm!
It would be a stupid business decision to give up Rousey Holm at this point. You have to exhaust all available resources before you move on from Rousey. The casual mainstream interest in her vs. everybody else in WMMA is not remotely comparable. Also, Holm is on a 2 fight skid, even though she's far more credentialed than Cyborg's typical opponents, she still needs to get something in the win column before fighting the female FW GOAT.