I don't have a voice in mind going into a game for the protagonist, like for characters from a book, they occupy a kind of Heisenberg state that is gradually determined as they interact with the world. A lot of times when characters are voiced but given different, lets say personas, to play into, it can work well if you stick with one, but if you change it up at all they start sounding schizophrenic. I'm thinking of the one's like DAII Hawke's wild divergences in tone.
That's one of the beauties of the old-fashioned style of doing voiced lines, you say the initial line to establish the voice and tone, and then pepper in more lines at dramatic moments to sell it. If they did that for Tav I think it might work better than having every line voiced.
