Season two's been a mixed bag for Rose. Her enthusiasm and growth throughout season one were a pleasure to behold, but this season the writers have seemed uncertain of what to do with her. In fact, she's been downright annoying at times, so perhaps now was the right time for Billie's departure. That's not to say she won't be missed, she's was instrumental in reviving a much loved British institution, and breathing life into arguably the best loved companion since Sarah Jane. But it's better to bow out when you're on top, and Rose definitely went out with a bang.
