The Last of Us was nothing original, every single moment and character pulled heavily from its genre.
What made TLOU fantastic was its execution, writing and performances, storytelling through gameplay, and everything I've seen of Part 2 has shown that that ND is on the top of their game once again. Personally I expect Part 2 to be better, in the same way that Uncharted 2 was better than 1. They already have the incredible foundation and amazing characters, a generation's worth of refining their tech, a very specific theme to laser-focus the games and storytelling around, and a wealth of character conflict and fallout to explore without the need for introductory pacing