I agree with
@Spirit about the return of hidden skills. But they should not be optional, instead required to defeat certain foes later on. That said I wouldn't want to completely return to TP's combat as such as it was rather slow paced.
Wind Waker actually had the fastest paced, most acrobatic and visually exciting combat. This is is what I want expanded on. Zelda generally does not have great combat and it's often slow and not very interesting to look at. This should change.
I'd also like to see the return of parrying as it adds to the visual excitement. Though rather than it being some godlike ability you can just wait for to effortlessly defeat your opponent I would want it done more like Metal Gear Rising where you must input a direction to parry a participar enemy when you are surrounded by foes. And yes I want big hoardes of these foes to take on not just a maximum of three enemies.
And definitely scrap the weapon breaking mechanic! It is awful and game ruining.