The lack of diversity of guests on a show claiming to be "the mothership of balance," is quite hypocritical. Since NewsHour is PBS's flagship show, it definitely isn't a good look for PBS, whose "service" was critiqued for letting their alternative voice die and its obsession with commercialization. And that was five years before this study.
With more females, more races and different political views, NewsHour, and shows like it could present a more balanced representation of the US. And by the decline in diverse ideas, NewsHour essentially violated PBS's editorial guidelines to "emphasize that 'the surest road to intellectual stagnation and social isolation is to stifle the expression of uncommon ideas.'"