That was actually the idea in the first place, I just hadn't clarified it because I thought that went along with the theme of dire power equaling sure consequences. Reforming bones and repairing lost tissue takes more focus and power than she would've had before the demon entered her mind. Scrapes, cuts, and bruises would be healed up with no issue. Bullet wounds and gashes would push it. Broken bones, which are likely to happen from bullet wounds anyway, would be far more severe. Critical tissue damage, mortal damage, and restoring lost chunks of flesh all the way to lost limbs would guarantee an awakening. Except for the least severe examples, they all add up. 

Anyway, what you described was the intention for the power, I just hadn't really... said that. Sorry bout that.