But what is "do whatever you want" if there isn't much to do? Is swimming, climbing, skydiving considered doing things? What about hunting and gathering? Ofcourse it's all subjective but to me this kind of freedom falls flat if it isn't incorporated in something else. What if the shrines had enemies, varied and unique sometimes, traps like lava/holes in the ground with insta-death, jumping platforms and obstacles - would that have deterred or added from the games notion as it exists today?
What if that shrine where i created an ice block at the snowy mountain and waited for daylight sunshine to climb up on it and cast Link's shadow on the portal, what if the mountain itself opened up and there was some kind of world inside there? Instead of a treasure chest that gave me whatever weapon it was that i already had, now with increased durability or whatever the fuck it was.
When you go to that fountain fairy to increase your clothes, that feels like an interaction of substance. Except the shit she enhances i barely even need anymore at this point so yeah i don't know.
I don't think intertwining the exploration with more substance would lessen the game it would elevate it.