It focuses on character but there's no depth. There just plain and bland. I wanted to hear from Katie's character why was she so obsessed with these stars and what did she have to gain. To me, she just wanted to steal because she could.
While all the other Patronuses seen on-screen were completely computer-generated effects, Snape’s Patronus required a practical effect so that it would cast light on the trees and leaves as it leads Harry through the forest. Chief animal handler Gary Gero drapes a suit of battery-charged LEDs over an Irish wolfhound so the artists could composite the glow from the LEDs with the CGI doe.