EDIT - [redacted]
Anyway. The criticism over voiced protagonist, just in case it's gone amiss, is not about not being able to handle voiced protagonists and crying about it. Everyone here has played Witcher games, possibly Gothic and Risen series', Deus Ex and more, so there's no problem in handling character voiceovers. The point is about finding and discussing (or debating/arguing, which ever way one sees it) an RPG ideal as per how CP has been advertised to be hailing from CP2020 roots, and how you are supposed to "be" V, and how you're supposed to be able to create your "own" character (even if just a "version" of V).
Someone who's been keeping tabs on interviews, can dig up the quote about how CDPR doesn't want the voice to interfere with the players idea of his character (and tell me I'm bullshitting, if that's not what they said), so CDPR already kinda agrees with the criticism. But they obviously aren't going to completely jump ships on this one and delete all the voicework, but if my memory actually does serve, they've implied some measures to be taken over that (what, if any in the end, no idea).
The crux of the criticism is about the feeling of ownership over the character that comes with the ability to interpret him/her as the sort of character you have in mind, and going further from that comes the possibilities of wider range of dialog expressions (cowardly <-> heroic, silent and subtle <-> loudmouth, ingratiating <-> shy, nerdy <-> gruff, etc) that one VA can't do believably (and won't due to the costs of voicing all those lines). The voice can create a "feeling" about the character, this is true (Geralt and Adam Jensen have pretty recognizable voices), but it also detaches you from him, denies and distracts the freedom of interpretation and limits the ways to roleplay that character. The voice will always be the same inspite your characterbuild or characteristical idea, so every subsequent playthrough will also be largely the same. And if the voice is deemed intolerable, either by tone or delivery of acting, it can't be helped. This negatively affects the whole experience through and through; if one has to "suffer" through the dialogs, of which there is allegedly a lot. And it makes the character have unwanted character, the "roleplay" is tarnished and few options of developing a number of combat related skills isn't going to help.
That's about it.