Those who wanted the more mature-looking game got Twilight Princess, didn't they? So it's good that we got Wind Waker and Twilight Princess, instead of whatever Wind Waker was originally going to be, because that means more diversity.

Possibly.

Nope because part of the charm and appeal was the art direction it's what brought the game to life Nintendo realised that after TP and why modern Zelda games have a stronger approach on such art directions to bring the game's vision to life plus it ages far better.

This question is nonsense. Wind Waker wouldn't be Wind Waker without the art style. It would at least have to have a completely different soundtrack, let alone themes,story and name.

I think a better question is "Was Ocarina ever meant to be realistic in the first place" to which my answer would be no.