I swear his 'crush' over Missandei is the cutest. I wouldn't mind him going to Nath at the end of the story
I was also re-thinking how much he suffered by Tyrion's hand, and he was mature enough to bear it without causing drama. People usually start revenge's plot after someone murder part of their family...and he doesn't.
He was mad at Tyrion at first, but he got over it instead than boiling up rage. And when they went together to KL he was actually concerned about Tyrion's safety.
Ssuch a constructive lesson from a secondary and not noble character.