I apologize as I have not read the entire thread, but just pitching in my own feedback.
I generally prefer TP perspective for RPGs, but FPP for shooters. So in a sense I think I am kind of mixed, and this game to me looks like a blend of both types of games. What I liked and didn't like and trying to be constructive:
GOOD:
I think the combat can only work really well in FPP, but I think this might be showing my natural bias. The immersion feels much better to me fighting in tight quarters in FPP, and the likely verticality of parts of the game would make TPP awkward to me. I also liked how the other characters looked and interacted with you in a lot of cutscenes and with the "eye" change and the Dex ride, etc. I felt pretty immersed for these scenes. I doubt I will miss TPP for combat generally.
I kind of like having cut scenes where I can see my character's reaction, but I can also accept the FPP for these scenes too as it does feel realistic to me. I think as a whole this perspective will work for a lot of the game, but I wish it wasn't 100% this way.
BAD:
I noticed at times V would open a door, loot something, or push something but the hands would not appear to do that action, so it broke immersion for me much more in FPP than I would have in TPP this way and maybe that's because the back of the body blocks it or something, I don't know lol. When V rigged the engineering skill with her hands, that is exactly the right type of animation/movement you should see when you interact with things in general. Maybe not worth going all the way on this if it sacrifices story, etc.
I also was VERY bothered that (maybe you can and it wasn't shown) you could not look down and see your own legs/torso/feet while walking (non-combat) or just looking around. I get you could see the legs in certain scenes or sitting animations, but for me FPP missing that element is a huge deal to me personally. I can't imagine being that person so easily if I am just an invisible set of "eyes" not attached to a body I can actually see. I'm even imagining a pair of bloody boots next to a dead body as I glance down and I'm talking to Jackie at the end of a mission and so forth, kind of a better feel to me than just an invisible eye looking down. I'd consider this such a huge deal that it's almost a deal breaker for me unless the story can really somehow overcome this (and they just might) for me. I don't think it works for combat maybe, but just walking around I think it's a big miss.
WISH:
I wish in specific non-combat situations (especially when you are at home alone and say trying out weapons, clothes, and you can kind of see yourself before getting into action so to speak) you could have a TPP where you really get to see your entire character so you can really connect/fall in love with him/her and it also makes the character creation aspect that much more powerful, etc. I doubt I would spend more than 20 minutes on character creation if it's basically only FPP everywhere.
Despite all this, I don't care that much about the actual shooting (I am sure it will be ok) mechanics and true choice/dynamic outcomes and how they are impacted by player agency will likely trump everything in the end for my desire to play the game.