I just now noticed this project. This looks really cool! I hope it works out, because it looks great so far. Good custom sprites, too.
I presume you basically have Link starting with the flippers, for the reason Moosh pointed out, since Link could swim right away in OoT (imagine how hilarious it would be if he drowned by the shop in town in the original game...). I don't know if you're planning to script much, but,for the Zora Scale 'deep diving' thing, you could make it so that certain Dive->Item flags only appear once Link has the Zora Scale. Or some other approach.
When you do Hyrule Field... my suggestion would be to take advantage of how hilly/sloped it was, and the scattered trees and rocks and little fences and whatnot. It's remembered as being very empty, but there is at least a little bit to it. I'm sure the way you're approaching this will come up with something cool, since it's clear you're putting a lot of thought into the original maps. But also, don't beat yourself up if that area winds up being a bit empty, since that's just being faithful. It's really just a connector between the other overworld areas anyway- the way I see it, Kokiri Forest, Death Mountain, Zora's river, Lake Hylia, and Gerudo Valley are all part of OoT's "overworld", it's just that they sort of divided it into sub-areas for memory reasons, kind of like how Zelda II has that big east/west split in the middle.
Edited by Mitsukara, 28 December 2017 - 06:43 AM.