- Does it still feel like Zelda and I’m just worrying too much? Because every time I see footage of this game I feel like it’s a more “western open-world” type of game with a Zelda coat of paint.
It's still Zelda. Remember, Zelda 1 on NES was essentially an open world game. Think of this game in that vien. Sure it takes cues from Skyrim and Witcher III but it has that Zelda spice to it. You'll feel right at home.
- Is the green tunic still in the game? If so, is it easy to find or do you have to follow the story in order to get it? If it’s side-quest related I want to get it ASAP.
Yes, it is in the game. You need to find the armor to fully assemble the armor. There are numerous other full outfits from other Links as well.
- Are the dungeons good and/or unique? I heard there’s not a lot of them, which is really disappointing seeing as it’s my favorite part of the series (And no, I’m not counting the shrines as dungeons).
There's not a lot, they focus on traversing the structure and not finding keys, master keys, etc. The puzzles can be challenging from what I've played. The "dungeon" of the game are few and far between but the 100+ shrines more than makes up for the puzzle solving goodness known to Zelda. But as you said, you don't count shrines, but shrines contain most of the puzzle solving that Zelda is known for. Don't think of dungeons in this game as dungeons from previous games, they don't serve the same purpose. So I guess in this regard, it might be disappointing to you.
- Did they really remove heart pieces and the music/animation for opening a chest?
Yes, heart pieces are gone, but they have been replaced with an equivalent. So yes, getting 4 or something can turn into a heart container or something else. The opening animations are gone. The chime music isn't. It comes in piano form and orchestrated form for very special items.
- Does every weapon break (Including the Master Sword) and can you repair them?
All weapons break to my knowledge, you can't repair them. I haven't gotten the Mastere Sword yet so I don't know if that breaks. Sorry.
EDIT: Bonus question - Is the "puzzle solved" tune still in the game?
You bet, that's something you just don't mess with. No matter how much you break the conventions of Zelda.
