Quantity will not make this game any better. Instead we need quality which would also involve some change in terms of core-mechanics of the game. Why should I return to a game that has such an imbalance in every part of it, that is infested by campers, that has no spotting, etc.? New maps and new content might make people revisiting Battlefield 5, however it will only have a temporary effect. People just want to test the new things but they will see that nothing really has changed so they will abandon it again quickly. The problem is not only content but rather much deeper in the game itself.