Just something I was thinking about...

It may just be my interpretation but to me it seemed Aymeric didn't shoot to kill the possessed Estinien but was aiming at one of the eyes. At least the arrow was in perfect position for the dragonified Estie to intercept it with his hand:
https://youtu.be/MzfqJ0aBhik?list=PL...Tq3e39xZ&t=934
Could destroying the eyes free Estie?