Until L7 is like a classic quest in the ocean, then it starts to get more epic and complex. It's way more long than you can expect and there is a lot of love about Ocarina of Time, you will see.
The meat in this quest is the exploration, secrets and misteries. It's quite easy and there is a lot of freedom later.
Currently in Level 6, so I'm getting close to seeing this stuff you mentioned. Also looking forward to it too.
You know of a better one? Please tell me where to find it! I could probably put it in before I update the quest file
I'll send you the MIDI via PM. It still might not be THAT great, but IMO it's much better than the one you currently have.