For me Person Perspective its what creator want a game how it looks like
In 3rd Person Perspective players get more sense of what kind the "thing" they are playing at
as game progress main character will change some how like his/her Identity or custom that was made by players' decision
Its much stronger feeling such as Deus Ex : Human Revolution which view they use make player feel much on character himself than previous series
Oppositely, Halo no matter how master chief changes play can get any thing except from cut-scenes
In 1st Person Perspective you can make more personal view on how enemies look and environments from main character.
Player can understand more your weapon design or even players tech interface such as Deus Ex, Borderlands or Crysis
Personally I like players are allowed to switch between 1st and 3rd in the cyberpunk game.
Because in 1st pp view high tech weapons won't just simply shooting things, it can also been designed to be able to transform to sword or something else.
In that view creator can make pretty awesome animation on how those weapon works and how other tech weapon around character's wrist looks
In a game Alone in the dark(2008) Which design a pretty imperative interface to show how player store their item into a limited place.
Also they have to think how to use limited place to care enough items to solve the puzzle in a head.
Alone in the dark is basically a 3rd pp game but when shooting situation comes player can switch to 1st pp to aim enemies.
That just very good design for both action and shoot game works.
Fist fighting situation in Deus Ex, it gives players another option to achieve non lethal style to finish a mission.
In Dishonoed It makes pretty repayable chance to see what if I kill or no kill this character will going to change in future.
Its a ideal design for a sand box game, however creators have to put more affair on this kind of design.
Either ways, I believe what ever CDPR decide it will be a great game. And I am looking forward to see it.