If you reverse the wiimote + nunchaku, then you're going to get messed up when using the sword and shield simultaneously (if that's even possible). I'm just saying, it's not intuitive. Switching Link's sword arm is not going to pose a problem. Sure it might be untraditional, but it's not going to make the game any less enjoyable. If it does for you, then you don't deserve the game.
As for mirroring the world, I don't think it's something to get worried over. You haven't played the game yet, so it's not going to seem out of place. Whichever version you play first, you will instinctively know as the correct one.
Honestly, some of you need to get your priorities checked. Yes, we expect this to be the best Zelda ever, and that means it has A LOT to live up to. But tell me, would OoT be any less good if Link was right-handed in it? Just wait and play the game before you start getting your panties in a knot.
On another note, have we heard any new details regarding the game since E3, other than the controls? It comes out in less than 2 months, so it's about time we'd be hearing something.