COD will never return to how it was back in MW days.
Why? Because the graphics is what lays on importance. It makes our memories the memories they are on the games.
The bad graphics in the MW series back then made certain things look funny or creepy, and some of us may remember some of those things! Now days they focus on the best graphics, when in reality I can bet money, if they used the engine they used for MW2 or MW3, and made a game, players would love it.