I am very much disagree on this just from the very fact there is a clear way to do it properly, many ways in fact.but regardless of whether CDPR intented to skip TPP altogether, or planned but scratched it somewhere during the development, adding TPP now would introduce some serious complications. How to connect it to all story moments, designed purely around FPP (animations, camera, things that happen to V from our eyes' perspective)? Making separate story sequences with TPP would mean an enormous amount of work - they would have to design whole sections of the game again for that particular camera view or just cutscenes like in the trailers.
Adding TPP in the game, but keeping FPP in story moments would create weird transitions, even immersion breaking - it could break this certain flow of the game we are having now with only FPP. I myself kinda wanted TPP too, but after playing the full game two times I gave it a good second thought and I now doubt it would be a good idea. Just like @ooodrin said, it's rather too late for that.
Again, TPP mode can be easily COMPLETELY OPTIONAL with exploration & combat situation. This will effect nothing negatively to the dialog/story/cutscenes, especially when most of the times important dialog scenes will forced V to either sit down or stay in place. Such thing can easily auto prompt the camera from TPP back to FPP (which is literally in TPP mod btw). Again, bear in mind I am talking about optional TPP mode, not TPP cutscenes. That would be a different matter & I personally made my peace with it.
The argument of being "too late" make zero sense to me. There is nothing too late right now, with everything that already disastrously happened to this game. IT WILL ONLY BE TOO LATE WHEN CDPR ABANDON THIS GAME, if that is exactly what you wanted...
Some people also argue it would be to much of a hassle making proper animation for TPP mode. My god?!! This is a millions dollars AAA company, not indie game devs with 1-3 workforce & limited budgets!! WHEN IN FACT plenty of such Indie game devs actually have both FPP & TPP mode in their games!! LOL
Am I the crazy one here? LOL
ALSO, this game had spin off CP Multiplayer. Such a thing basically demand a proper 3rd person model live render when playing MP mode. I am no game devs or expert programmer, but I am pretty sure I know you need that proper "3rd person animation." This is why even old game (yes, old) like GTAV have 2 distinctive player animation movesets for TPP & FPP because they did add the FPP animation to equate a proper FPP looks that comes from "updates." Other FPP Multiplayer games with proper model animation didn't need to do it mostly because IT DEMAND a proper 3rd person animation.