I would like to see a greatest hits title with all of the maps updated from all of the previous Modern Warfare titles. I realize that this game would be huge in size and dev however with the increased capacity of BD and advanced hardware in the PS4 and X1, it could happen. We're talking all the weapons, all the perks, all the maps, and no story mode so online ONLY!!! It would be ridiculous and I know this game would blow past expectations.
Oh yea and I don't think changing the Sniper formula is a good idea. Think about how terrible Battlefield is with weapon sway and kick...way to realistic, in fact, its so realistic it's unrealistic. As an avid shooter/sportsman/gamer, please leave some element of simulation in the game. The closer you get to war, the less fun the game becomes. The other ideas are awesome and borrow from Battlefield 2 Modern Combat (the last good BF game) so I think the would work as long as they are balanced against other aspects of the game.