Not nearly to the degree as what we've seen. I actually had to tone down the filters a bit so it was even viewable.
Well, they haven't officially shown the lava levels, so... I think you're jumping the gun.
I really don't like the screens they released but I also don't believe they'll represent the final game, nor even necessarily the game as it is right now. Considering they only released some barren screenshots I'm led to believe Aonuma when he said they're from the period when they were dicking around with artstyles for the new Zelda.
Again, the current shots are ugly, but I don't think the final game will look like them. I expect bloom, but a more reduced version. As you said, the current levels make it hard to see things and thus hard to play. I doubt that's a trade off Nintendo would make.
I haven't played that, but could people have been talking about the intro vid? I remember seeing them side by side and the colors overall were yellowed in the 3DS version while the colors in the 64 one looked like an actual early morning
That's basically it, yes.