And if we're talking about characters... yes, overall the characters weren't as developed as The Force Awakens, as long as by "The Force Awakens" you mean Rey, Finn, and Kylo Ren. Outside of those three, you have Poe Dameron who is... a cool guy, I guess (he seems cool!), Hux as a... bad Nazi guy, Snoke is there for a scene, Captain Phasma is a cool Boba Fett action figure, and... well, you get to see Han and Leia be very tired, which makes sense but also takes up time that other characters could shine. Oh, and Maz is there? I liked what's-his-face with the instabread portions. Jakku junk guy. Unkar Plutt! Oh, and the Space Ethnic Mafias.
Meanwhile Rogue One has Galen Erso's dedication and sacrifice, Krennic's sad ambition that turns into an ironic fate as he's just not good enough to earn his own arrogant opinion of himself, Cassian's coldbloodedness that he comes to grips with because he doesn't want it all to be for nothing, Saw's madness, Bodhi's attempts to try to do right and be a hero the easy way by simply delivering the message, which morphs into his willingness to throw himself into mortal danger because he's fully dedicated himself, Chirrut's never breaking faith in the Force and others, Baze's cynicism but quiet compassion that ends in accepting his friend's last wish, K-2SO's wittiness and frankness which ends with his unflinching acceptance of his own impending death, etc. It feels worse than it is because Jyn goes from a standard "I don't want to fight" to "I want to fight!" after she loses two father figures in a row, which is a pretty cliche way to develop her.