As expected, it's a little difficult for D.Va to be as emotionally moving as some other characters. Blizzard gave her a decent go and I think they touched on some very promising themes of pressure, combat trauma for someone so young being thrown into battle, and last line of defense stuff. But it got muddied a bit with their focus on the self-reliance vs leaning on others asop which I felt has never really been a compelling theme (outside of Hinomaru Zumou).
Still a very good cinematic, great at points even. Just below average by Overwatch's sky high standards.