I hope there will be full voiced protagonist, maybe they just wait to have all the lines set. It just feels weird when hero is the only one who is silent. And it's also very limiting for cutscenes. I don't really get how somebody could say that they would do such thing for immersion. Come on, it's a budget thing. Immersion is lost, especially when protagonist even now does say some things, scream some lines when castings spells or seeing something without cutscenes. So you just can't fully pretend that it's totally different voice.
I can completely understand that for some people a voiced protagonist is better, particularly is you come at games with a Hollywood mindset.
That's not true for everyone, though. I don't even notice that my character isn't speaking in games like Fallout3 or NWN2, because I'm automatically speaking the lines in my head, in the voice I have assigned to my character. Sometimes I will even play out alternate conversations in my head that are not even in the game! Different types of imagination, I guess.
This is preferable for me to spending an entire game trying to accept what I consider to be the wrong voice for a character I build, because there are only one or two choices. But each to their own.