Jyn gets no love here, all of her fans are in the figure threads, lol. I know some folks didn't care for her but she seemed to have a real kindness to her that would only come out when in the presence of those she truly trusted. Like when she studied the depressed faces of the commandos inside the stolen ship and gave them a pep talk not just to inspire them to fight but also to give them peace of mind for their last battle. Or stopping to give her weapon to K-2 not just because he might need it but specifically because she knew that it's what he wanted. Taking Cassian's hand on the beach to let him know that someone finally genuinely cared for him.
I found that all to be very endearing. And the way Felicity played her when she confronted Cassian about her father's death. Venting her anger toward him while clearing yearning for validation over her heartbreak. Validation that at the time Cassian refused to give her. *shrugs* All of that made it very easy for me to root for her.
I agree, she was played Very Well. The scene with her confronting Saw about being left behind is great aswell.