Going through Uncharted 4 again ahead of playing The Lost Legacy, which I got for Christmas.
I think I'd still rate this second out of the four (after Among Thieves, which remains my favourite game of all time). The only real complaint I have is that it lacks any truly standout action set pieces on the level of the urban warzone or the train from Among Thieves, or the plane sequence from Drake's Deception. The story and characters are back to being amazing, though, those being the two things that really dragged the third game down for me. In fact, the writing in this is perhaps the best it's ever been in the series. I really love these guys.
Oh yeah, I'm trying to battle through it on crushing, and it's an absolute bitch.