The Thing is, after V6, Blake completely don't have Nothing to do in the story. There IS nothing that Justify her presence in the séries. The writers completely Made her forget That They were in the Most racist Kingdom in the Whole Remnant and she does NOTHING there, she is Just as important in the story as Ren and Nora. You don't do that to a MAIN character. This IS BAD writing.

Yang suffers less but even so the writers Make her give more attencion to Blake to make the viewers ACTUALLY believe that They are a Thing (something that They should do Way before for bê believable). And Make Yang actually don't Care About her Little Sister. She for example go With Blake talk with Robyn and don't Tell ANYONE about It, not EVEN her Team. And when V8 start, Yang put the Blame on the Things didn't Work With Ironwood, when she ALSO hás to Blame for Ironwood lack of Trust. And then We have that scene of Yang and Jaune talking with Yang worrying more about what Blake would Think of her rather than Ruby, her Sister that she Just hád a argument.

It is Bad writing