This story was okay. I thought that the way that her dancing attempted to communicate feelings and ideas was interesting, put to mind sign language. But that was also the part that bugged me the most, because it seemed entirely clear that she was the only one who understood the language and then she got upset with people for not understanding the language they didn't realize was a language. Her requirement that mistakes should be incorporated as part of the chasing of the three rats song makes sense, but only if you know what the song is about, and I didn't get the sense that anyone but experts was necessarily aware of that. She put all of her anger and sense of betrayal and everything into the dance and then got upset when he didn't seem to divine her meaning. They thought of her dancing as an entertainment, which I don't think is an unreasonable interpretation given their history, and she thought of it as a very broad communication medium which I also don't think is unreasonable given her experience. But I don't think it's very reasonable to use it as a communication medium toward people looking for it as an entertainment and expect it to do anything other than entertain. Even in the end, it didn't seem that he really realized even on his deathbed that it was supposed to be communication--he just realized that the automaton's entertainments were repetitive and had become dull.
In that way it's different than sign language, I guess, because sign language is more obviously a language. One does not pay entertainers to make gestures with their hands--if someone is doing that, then they are speaking sign language. But embedding a communication in a medium which most people look to for entertainment, it's like using the entertainment as a carrier wave but without telling anyone how to decode the language, or even that there is a language.
So, while I understood her frustration, I had trouble feeling much for her because while he started the situation by taking the automaton, she didn't really make much effort to do anything about it either, at least not in a medium that he would understand.
I found the ending frustrating, too, I think because the story made it seem that it was all about her feeling better about their relationship and seemed that she was in a happier place because of it, even though he's freaking dead now (oh but that's okay because he died watching her dance *raspberry noise*). She even thought specifically that this wasn't the place to air old grievances, and really it's not. It seemed too selfish for his deathbed scene to be all about her. And it seemed like she thought he magically understood her dance-language at the end and that was why she was happy, but I really don't think he did. He liked watching dancing, his automaton was busted, he had minutes to live, and she was available and willing to dance. I don't see how that's supposed to make her feel better.