It's fancily worded, but my concern is her dissociation can be activated on herself. In other words, she can separate herself from reality at will and make herself completely untouchable. Even if I've misunderstood that, the ability allows her to basically make any object do anything as long as she can rationalise it, which is pretty much completely in the writer's control. 

Dunno, it's almost too odd to work without proper restriction. Just my take on it though, the GM's will do as they will.