I kind of doubt Pintsize would want a more human-like chassis, honestly. He gets away with a lot of what he does because he has the chassis he does. Things he wouldn't be able to get away with if he had a more human looking chassis. Human nature being what it is, we expect human like behavior out of things with human appearance. That's why the Uncanny Valley concept exists. And we've seen that the closer to human looking an AI is, the more like a human people will treat them. Perfect example is how Momo was treated in her chibi chassis vs the Idoru one she wears now. Same person, but before she was treated more like a child, and now she is treated more like an older teen/young adult. For more extreme examples, consider how Gordon the spider-bot, Bubbles and Momo are treated.