Yeah I didn't buy the cgi humans either, though it wasn't a huge problem for me.
What did bother me was hanging threads like chekhov's mind control insanity octopus. Also there's abrupt character stuff like a scene in the final act where Jyn and the heavy weapons guy have a dialog that seems to be concluding a relationship arc. Unless i missed it I don't think they had even spoken with one another on screen so it came off as sudden and weird.
I'm guessing theres some cut scenes on a computer somewhere that fill in the blanks or maybe I just missed it and should pay more attention.
All that said I still enjoyed it, I'm sure plenty of kids got to go get excited about Star Wars too so whatever.