Where did you get your info from? How do you know that Uncharted 2 did not have local co-op because it didn't want to sacrifice graphics?
"Uncharted 2 -> Verges on defining a new description. Ledge shooter vs coridoor. The gameplay window is very narrow in that game which means they can only offer one path through the game due to their streaming tech. Lara Croft was better years ago because it gave you options, it wasn't some silly slow the player down whilst trying to make it look spectacular as you stream in textures for the next scene game..."
Wow really? Uncharted 2 is incredibly fluid even through intense combat, and I'm sure that if Uncharted 2 was made any different it wouldn't have been praised as such an incredible game. So what if Uncharted doesn't give you any options; It still gave the gamer an amazing experience that tops most hollywood movies. Have you even played the game?