looking at the number of bandages on her hands and the rings around her eyes though id say she'll probubly collapse either before the fight [or pat way through] due to blood loss.
I still think it was due to cancellation - the fact he got given the time to get even 4 episodes to wrap up anything was generous of the publishers.
Also note that the author hasnt exactly had much sucess after this series - after a short series called my sister+ ended his most recent series...
As manga magazines in Japan have regular polls to determine the popularity of their series i reckon it was either poor ratings or word from the publishers thats lead to the series getting such a rushed ending.
Apparently Comic Ryu [where Neko Musume runs] is switching over from physical publication to digital from July 20 - fortunatly this shouldnt effect the physical releases of the Tankobons though.
https://twitter.com/ikenokappa/status/1020557826681331712