The CDI games were officially licensed by Nintendo and they were disowned after the facts because they sucked so much. So sorry, they are official Zelda games. They weren't deved by Nintendo, but then again neither was Goldeneye nor the Prime trilogy and we all cream our pants over them. Trying to ignore them doesn't take away the fact that Nintendo greenlit those games.
Nintendo should add voice to Zelda, I agree, but not Link. That's it, that's all I say. A voice acted Zelda will be God tier, but keep Link mute because I'm tired to death of "badass tryhard cool as you'll never be" hero #5632 that permeate games these days. Link should never become that. Also, imagine, like, really what Link would sound like, what personality would they give him?