These seems more like something they should consider for the next Zelda game. Except for the ability to fly. That's just silly.

When Link jumps, he uses a lot more Stamina. Than if he just climbed up normally. The same limitation would be added to the Hookshot. It just gives you a chance to bypass. Like how you can ride a tree log to the Master Sword.

Using the spoiler feature would be better, than a spoiler tag :p

I'm not close to beating the game yet, but my #1 thing to change is to add background music rather than ambience

Again that would make too much bypass and would make automatically climbing, paragliding and stamina (one of most important elements of this game) would be much less important in game. You can ride a tree log to the Master Sword but thats not so easy to do, but using hookshot is of course very simple.

Are you kidding me. The moment I saw the guy do it on youtube. I copied it.

I would like to be able to invest money, buy/create more buildings, create businesses and enjoy a bit of "Sims City"/"GTA5" vibes. Also I would like to fly, to dive in the water and many more sanctuaries along quests, etc.

I don't mind If they ad another 100 playable hours :)

That's the thing, I know those things wouldn't fit in BotW, but they could make them work for newer games. I know adding some of these things back would make the game too easy, which is why I gave some ideas for how they could reimplement them. For example, rupees/hearts on grass -> Limit them to specific spots of grass. Flying -> Give Link a Loftwing as an end-game reward so it doesn't make paragliding pointless, just a silly fun thing for you to do after you're done with the main game and just want to wander around.

I also don't fully agree with the whole "You have to play before you judge it". I think it depends heavily on the game, mostly if it's a new IP imo (Hated Splatoon when it was announced, loved it after I bought it). Did Paper Mario fans have to play Sticker Star/Color Splash to know that they wouldn't like it as much as older entries because they wanted an RPG game instead of what they got? It's how I see BotW, I don't think it's bad that they shaked up the formula but it's not necessarily what I want from the franchise, which is why I'll play it and enjoy it for what it is, but hope that the next game will bring back the things I loved about Zelda while still keeping the new things BotW brought to the franchise. No reason why we can't have both, they just need to balance it out. 

Btw, did your reply cut off at the end there?

You can hardly see how something fits in this game (or not) if you didn't played and went deep into the game.

1. Discover the map as you go option so you can see where you have been if you ignore the towers. It's one thing that Horizon has over Zelda.

2. Let me replace weapons/shields when I pick them up, not close chest, open menu, drop item, open chest again, painful.

3. Either start with more weapons slots or improve weapon durability. Weapon durability is no issue when you have 15 to 20 on hand, with 8 it can get painful when 4 of them break on one Lynel and you're left with a torch, a sledge hammer, fire starter rod and one old weapon.

4. Add caves / underground areas to explore and more indoor areas like Hyrule castle.

5. Diving, underwater exploration, agreed.

6. Music, bass, proper surround sound. Sound was very underutilized in the game.

Your points about bosses were pretty bad. Big monster with glowing weak point has never had personality nor uniqueness to it.

The final fight in BotW was dissapointing, I agree with that, but Calamity Ganon was great. Techno-spider Ganon is also fitting because he's meant to be taken the powers of each Divine Beast (their weapons), and he corrupted the Guardians. It's very fitting, and borderline creepy/ugly (I personally like that).

As for what I would change? There are more things but these are what I most care about.

1. Like Svennoj said, caves. There's like 3 of them, and I loved them. I wish we could've found some cavern that lead to the heart of Death Mountain.

2. Crafting and/or customizing your weapons. I found it really dumb and bad designed how you can't give your weapons buffs by yourself. It's really dumb that it's randomly generated and you can't choose what you get. And building your own weapons would be pretty cool.