So I'm conflicted.
If Coda was a real person, we end knowing Coda asked Davey to not share his work with others, meaning the game goes against Coda's last words. And so while I enjoy experiencing the series of games and seeing "Coda's" work evolve, I personally end the game feeling dirty for playing it.

But, if Coda isn't someone else and is past/fictional Davey, then the emotional aspects of the story while meta seem shallow. Or am I supposed to grasp the emotions of feeling guilty for playing the games of a fictional character who doesn't want me to?

At the end of the day the meta questions don't resonate with me as much as diving into the mind of a game designer would. But that isn't the narrative here, its of ego, acceptance, and deceit.