Indeed.
Voiceacted protagonists limit the players ownership of their character.
And they do indeed all sound kinda the same, flat and toneless. And they kinda have to, too because they need to at least try to remain somewhat neutral-sounding to appeal tothe varied tastes of the audience. And from that angle, it’s a bad idea to give the protagonist (in an RPG) a voice. It’s never ”the right” voice.
I’m not terribly excited about the game (seeing how it, too, seems to be just another shooter with a twist), but going with silent protagonist (and the explanation for it) is definitely one of the better decisions the devs had with it; along with its narrative design.