In the early stages of this film we have a girl broken, torn, lost as a result of everything the Rebellion was and is. She doesn't care. This is not her war. She's "out."
The only thing she has been motivated by so far is survival and hope of reconnection with her father.
The midpoint brings much change.
Jyn connects with her father, and immediately they are separated. He is left for dead. You can see the pain in her eyes. She is threaded into the war with fresh wounds, fresh motivation.
From here we run, the truth comes out amongst the team, a division that leads to union.
We have a lead character who is for the first time fully engaged. This is her fight again. She is in.
Her and Cassian walking to and boarding their ship shortly after is a moment for the audience to breathe all this in, to recalibrate and celebrate for a moment before our next danger. We also see a new glimmer of love in these moments. Between our two lead characters.
(Directed by Gareth Edwards, screenplay by Chris Weitz and Tony Gilroy, story by John Knoll and Gary Whitta, based on characters created by George Lucas.)