Rose KOd JJ 7 years ago, and Zhang 3 years ago, both at SW.
And not to knock those KOs, as they were good, but Joanna struggled with a weight cut. Zhang she just caught perfectly. It's not like Rose is some KO artist. Those two KOs are her only KOs in her career, which is sort of incredible when you think about it. Can't KO anyone but can KO those two of all people in a round each haha.
But now she's in a higher weight class, older, and her cardio isn't as good as it was. She looked way better against Zhang and JJ in the 3rd, 4th and 5th rounds back then than she did against Ribas, Tracey, and Erin more recently.
Rose's whole issue has always been with girls who can put the pace on her. Up until the 2nd Carla fight, all her losses were like that. Erin was always going to make the most of that weakness. It was less about Erin improving her striking and just being a bully once Rose started to tire after 2.5 rounds like she always does.