1. Motion Control.
Skyward Sword's gameplay was fantastic, I loved every twist and change it offered.
2. More original missions.
My favorite part from Skyward Sword were actually the stuff that weren't typical from a Zelda title (Silent Realm, Stealth), I want more of that.
3. More areas and weapons.
Honestly, this was were SS let me down. While the game was big, it was only because Nintendo stretched it, maybe even too far. We had very few items, the overworld was empty, the world below didn't have anything deep (Okay, Lanyru backstory was actually amazing), but I just felt the world was dead in comparison to other Zelda games.

I had an idea earlier where the intro is basically you getting a sword and having to fight your way out of a place with increasingly complex enemies - never very complex, no more so that Bokoblins in Skyward Sword, but enoug hto familiarize you with directional combat.

After that you get a little story.

I'd like that.

you should be able to steal cars and shoot cops.