Upon further thinking, I think I may of cracked what Death Stranding is, in a way.
To put it bluntly, it's carrying the sins & souls of those departed to their final resting place. And to be a bit more explaining, we play Sam Bridges, a delivery man, assigned with the tasks to deliver the souls and sin's of the departed, albeit for whatever the reason, to their final resting place. And the game's major mechanic, revolves similar to a game from a few years back, named UNDERTALE.
I think we will see the game give you the choices that you make, can determine the outcome of the world itself. You can be a peaceful force, or destructive, carrying more and more sins to eventually become something inhuman. And when you kill or hurt, it can have an impact on the world around you, perhaps lesser amounts of individuals, the environment's deteriorating because of lack of maintenance, or even more of those "linked" souls as I call them, adding even more difficulty to your game.
That to me, is what I'm starting to think what Kojima's Death Standing truly is. Almost like a Negative MGS in how it presents itself, and it's message.