So in exchange for a retiring idol that everyone loves and will be heartbroken when she graduates, they get the one who got unpopular for betraying the fans' expectations, was terminated for going against the company's policies and caused a scandal for both the idol group and agency it represents.
That's almost like letting go of Kiryu Koko for Uruha Rushia, and I daresay there would be a lot of oppositions from the fans to Holocorp for making that kind of drastic decision. Can't deny something like that may happen here.
Don't know if she's that desperate or what, but she's clearly one who doesn't learn from her mistakes without dragging others into her shit.