Aight, so I'm just going to jump in here and generally reply to all the "having a voiced protagonist is bad because that takes funds/time away from NPC dialog/other things, having a non-voiced protagonist is better because you can see the full line, make up your own tone, etc."
First, with regards to the whole budgeting debate; let's say you're right, and say that time/money could have gone to more NPC responses, armor for your dog, or some other feature. So what? The time/money was put towards a voiced protagonist, a feature Bethesda, I, and many others think would make a great (and long overdue) addition to the series. You disagree, and think the time/money is better spent somewhere else. Good for you. You have things you value over a voice protagonist, and we value a voiced protagonist over those things. You're entitled to your opinion, but don't act like the game is made objectively worse just because there's a feature you don't like.
Speaking of... Second: with regards to the whole "see the full line, make up your own tone": No offense, but if having that level of control over the imaginative experience is what you want, go read a book. Books are wonderful in that your mind is the only limit, and you can imagine characters, locations, etc however you want. Videogames, however, are visual and auditory experiences. While you can certainly have games that succeed without a voiced protagonist (hi, Portal), an RPG demands a voiced protagonist; having the protagonist be unvoiced was an obsolete hangover from the days when company's didn't have the tech or the budget to have all those lines be voiced. hardcoe Fallout fans are in the extreme minority here; the vast majority of gamers (many of them casual, to be sure, but they count too) want a protagonist they can see and hear; Bethesda is going to cater to that majority whether you like it or not, because they want to move as many copies of their game as possible.
I empathize with ya'll, really, I do. I'm incredibly upset with the direction the Halo franchise has been going the last two games (Halo 5 is going to be the first Halo I won't be buying). Cutting splitscreen and closing the skill-gap between casual and experienced players are absolute deal-breakers for me, but I understand why they're doing it; they're willing to make an inferior product in order to appeal to a larger audience. The difference here is I honestly don't think adding a voiced protagonist objectively results in an inferior product (ESPECIALLY if they give you the option to mute the protagonist).