I'm not a fan of big squads in the women's game. Players aren't paid enough to justify them getting minimal mins on the pitch; though it would be more understandable if it is an older player, coming towards the end of their career, than the way United have treated Ivana Fuso and Lotta Okvist.
Hard to see Jackie Groenen wanting to sign a new deal at United if she's not starting matches when fit. Perhaps she has already made the decision to leave.
Signing a CB as cover makes sense to me, given Millie Turner's situation, the other signings less so.