If your position on the topic isn't 'the game would be worst with a black actress', then I don't really understand your argument. The world is unquestionably a better place with more black actresses getting cast in roles that belong to them (I'm not going to elaborate on this, because it's almost 2016). You stand to lose nothing. You have everything you would have otherwise had, and also a minority or otherwise underrepresented party gets to have a win. It's a 'let's all eat the cake and have it to' situation. Everybody wins.
ND are an extremely talented group of people who do a lot for the betterment of, like, video games and its surrounding culture.Bailey is probably a fantastic actor. But they should have cast a black actress in the role.