Miyuki's got it kinda rough too, huh? If everyone's just gonna see her as Ruriko's daughter and not judge her on her own talents.
I'm wondering if that's the main reason why Ruriko kept so much distance with Yuu. Obviously we already know at first it's because she wanted to focus on fostering Miyuki's talent, but I wouldn't be surprised if later she sees how much being in her own shadow causes problems for Miyuki and wants to let Yuu grow her abilities without such a thing looming over her.
Still a pretty shitty way to go about things, but I can see the vision at least.