Think about it people jeeeez, metro in BF4 could be amazing. Let me just put a scenario out there....SO the metro is unchanged, ok maybe one less flag, then we get the outside grassy area AND roads / buildings above the metro making it larger yet at the same time for competitive 5vs5 etc we can still use the BF3 layout.
At least that's what I see in my dreams, reality tho will be quite different. It'll actually just be 1 flag in the middle of the locker rooms with spawn point at each end of the lockers.
all they have to do with metro is widen the escalators to like ten lanes or make another entrance and also widen. thats it.