So as far as I can tell from the myriad references and allusions dropped throughout the game world and the quests, the fundamental question Cyberpunk looks at the importance of having a soul, what the soul actually is, and its transience. It is not meant to be permanent. It is a fleeting moment in a much wider universe that is meant to be treasured. And V, in every ending except possibly the Arasaka ending, discovers this.
In some ways I'm surprised that any of the endings let V live at all.
Yes, it's not to everyone's tastes, but it's extremely ambitious for a computer game (cf Blade Runner as actually intended by its director).
I think many who played the game, mentally only had a similar journey of the devil ending. The game's whole concept is "what's the meaning of life?"
but many player's only got to the same mindstate of V at the devil ending, Mad to be stuck in mortal form, chasing longer life without answering, longer for what?
While some others were more annoyed with the options presented for how V chose to live in the end.
Regardless, its a pretty deep focus, and they developed this theme pretty well, the interaction between player and developer. through the game is well done. Thats why the mileage varies so much from player to player. We actually are all playing very different games. Thats great art I think.