I thought about this a couple days ago, actually. Honestly, it is really only crappy for the talent if it is a case like Rushia, where they put their own money and effort into their original songs and such and their whole existence gets terminated and they don't have anything to show (If voluntary-graduates like Coco and Sana don't still get royalties, that is fucked, though).
Obviously, that is really only an issue if you actually pull a Rushia. Otherwise, Calli and such are still gonna profit off their own music, they just don't own their chuuba character, so if they leave, they gotta go back to their PL or rebrand.
I also don't think she is getting screwed so much, as I have my doubts she would be able to sign on with a record deal anywhere close to UMG's level, even now, as DDK.