What the film really lacks is a strong and vigorous male lead (such as Han Solo or John Boyega's Finn in The Force Awakens) to balance more equally with Jyn and supply a sparring partner. None of the men here has real physical or vocal stature, nor any scenes in which they can decisively emerge from the pack in a way that engages audience enthusiasm. Both Luna and Ahmed have proved themselves repeatedly in big-screen and television performances, but their characters never pop here, to the film's detriment. And given that Jyn is rather less gung-ho and imposing than was Ridley's Rey, there's an overall feel of less physical capacity on the part of the main characters.