Well, The game would be different, but nintendo could do the voice well, but It would ruin my view of Link's perspective.
Too me, link is the guy who does not say a word, but does action! Mainly, when someone is either mad they use their words.
Link just kind off gives a glare and get's over with it. It maybe would be cool if the other characters talked EXEPT Link, That is what I would probably like.