Just accept that this is Mariah's personal style. I don't think she has someone on call 24/7 but that's okay too, I guess.
People hated Wilfredo until he was gone then they loved him. People were saying they wanted the "idol stylist" without knowing it was the same stylist she was working with all along.
People loved some of Robert's choices and hated others but it's ultimately Mariah. Remember how one of the designers stated that MC wanted him to open up the chest area on one of his designs for her? It is what it is.
It's kind of badass she just wears what she wants.