Why does having a female and black lead instantly send you right to "ugh, political correctness"?
I honestly felt it rather refreshing, especially after the abysmal 1-3 trilogy. Just a mass of monotone white guys running around the whole time.
Color or gender does not matter.
The (female) lead of the movie was OK.
As would be black lead or sidekick, but in this case the black actor felt shoehorned in pointless crap.
He was just there and did really nothing.
If he would have been white he would have been nothing, but as he was kinda advertised as the first black Stormtrooper and lead (maybe as a red herring), and then actually did not anything meaningful, he kinda felt like "Hi, I'm black, deal with it" and thus even less anything.
Hope that made any sense.