Regarding this whole female character thing. What I'd realllly love is if you could play as Zelda or Link. Problem with that, of course, is that would require extra development, as they both would probably have different interactions and Nintendo would have to justify it story-wise. So I doubt that's happening.
As for a female Link, I don't mind, as it really doesn't matter to me. That being said, I'd kind of like a completely new female character you can play as that has their own character design, instead of just being a gender-swapped Link.
RE: Voice acting. It really depends on how they do it. I've always been a proponent of no VA in Zelda, as I feel it would just be a distraction. But, if they can heighten story moments with VA, sure, fine. What I don't want is every single character to be voiced half-assed and it ruin the experience. And thank god Link will continue to be silent.