The tails are the source of her power, which correlates with either how hungry she gets or how effective Hinako's taste is on her. That's not entirely the same as how much of a beast she is.Thank you for the chapter!
If it turns out that beads were simply a part of mental conditioning and actually had nothing to do with why she changed herself. I'll be sorely disappointed for the time wasted on this arc. =.=
And what about her "inhumane" nature, She's already bit her tails off. At this point she is as nice as a puppy or till they regrow, or what. Did author forgot about that already?