I might be more inclined to criticize Firefly for not including more Asian speaking roles if it had lasted more than 13 episodes. It's hard to judge the intent of the producer's with such a limited time frame. It's possible, given time, that more Asian characters would've been introduced. The lack of Asian actors for main characters is more telling, but with such a small time on the air, I'm willing to give it a pass. I'll be more interested in how it plays out on Dollhouse with it's very obvious Asian culture inspired designs. So far, the show is one-up on Firefly with the Sierra character.