Fun seeing Littlefinger die, but I always thought it would be more in the spirit of the ASOIAF for Littlefinger to survive everything. To me, he was always kind of Martin's middle finger to all the fantasy tropes: he wasn't a "good" guy, he wasn't a skilled fighter, he wasn't noble born or a military tactician or born to be the most powerful wizard ever. He was just clever and prepared, and that's who survives in the real world, not good guys or chosen ones or indestructible knights.
What's odd is, as the story closes, it has started really veering back to the tropes Martin loved flipping on their head. Jon really is the chosen one, the low-born nobody destined to be king. He's good to the point of absurdity; he couldn't muster the guile to lie to Cersei, and he forgave Theon for betraying his family and indirectly causing the deaths of his half-sibling. He's essentially the classic fantasy hero, a character archetype that has been done over and over.
I'm not bothered by that as much as I am surprised. I read a ton of fantasy, and I can still enjoy a classic "chosen one" story. It just seemed like Martin was trying for something different.
Still time for twists and surprises, though, so maybe I'm wrong, and these guys have something up their sleeves.