Ii don't know. I think it worked. I was not overly emotional as Uhura started her address to the whole crew, but as her song started, i got invested and carried along with it - I was emotional then. If I was in a musical reality, I probably would have started singing and (a la M'Benga) I don't sing.
It if worked for you, that's great! My opinion is only my opinion

I was surprised that they actually sang their own pieces though. Usually actors aren't necessarily the best singers. I did notice quite a bit of vocal processing/auto-tune but that's pretty normal in this day and age.