I definitely hope she won't sign with any of those studios that you listed because I don't know how many of her films I would actually be able to watch with the kind of genres that big studios like Moodyz or Idea Pocket do nowadays - maybe it's just me, but lots of r***, no? And yeah, you might say that her films are kind of "hit or miss", but at least there's some variety! Now, let's just picture a world where she is under Oppai. I'd imagine she'd do a lot of films centered on her boobs or maybe exclusively that (it is Oppai, after all). She already does those anyway, so I don't see the benefit there.
But I do agree that she is definitely worthy of being thought of as a high profile girl!