The strenght of multiplayer games is in playing with others
The question is if we really need "massive", toward infinite amount of players, or "massive" can be something moderate that allow us to enjoy the game. How many people do you need in a MMO to fulfill the "play with others" feature? Isn't balance always better? Maybe technology is taken games too far, to a wrong reality.
It's sounds to me like trying to make an elephant out of a rabbit.
I'm having fun with an apocalyptic scenario for game design, but at the same time I trying to realize if the player would be happier playing alone and inviting his friends to his game whenever he wants, instead of an actual massively world in which you practically don't know anyone, and you also aren't allowed to make changes in their world, because that is not nice.