If it was an original story then I'd have no problem seeing plenty of black people in it, I loved The Wire and there's tons more shows that have a diverse cast and are awesome, but when they are using an existing story and they specifically change a characters race or sex for no other reason than to promote that particular race or sex I definitely have an issue with it, it's wholly unnecessary and adds a political context surely NONE of us wanted? well except black people and women who don't feel they are dominating everyone else enough.
That is what it boils down to, they need to not only be in a show but have the most powerful roles so everyone recognises they're incredible not only as an individual but as a woman or black person. It's ego stroking at best and disgustingly hypocritical at worst.
It also doesn't help when they fucking suck like that actress playing Fringilla.