Well, in the case of Firefly, the show was already pushing it’s luck by having two prominent minority cast members (who actually had something to do other than being a minority) anyway. They also didn’t play the card of having a minority that was atypical of what mainstream audiences think of when they picture that minority ; . Keanu is “part- Asian”, so he can be a Meiji era samurai. It also had strong female characters, and more than one. Yeah, lack of any strong Asian presence, especially given the premise is noticeable, but one show can’t solve all ills, which we tend to want movies, books and art to do. It’s a problem all creative people deal with in a society like ours where there is such a startling omission in the representation of certain cultures in media. If the show were bad, basically no one would care, but if it’s halfway decent it will get slammed for not being progressive enough.