Different time, different television, different issues.
Uhura was black and that was it. She was in any different to others, in general behaviour or the stuff she does.
Which promotes diversity in the best possible way. She is different visually but she is the same human as the rest of them.
That level of subtlety is out of reach for current productions coming out of U.S.
I'm not talking about race, religion and sexuality, because that's simple. If you want a lesbian character then she goes for a girl in the episode(s) allocated for character development. Just like Picard and archeology or Chakotay and DMT trips.
We're bound to get a fucking hipster/goth/annoyingly eccentric girl here.
I hope I'm wrong, and the diversity is about something real like slight mental disorders and people coping with them in life. But I don't think so.
In any case I'm just ranting and I will be watching this show from start to finish regardless of the main character being Maggie T. herself