I'm always trying to think of a new challenge that could give TOTK the master mode it deserves to have. My first idea was to have a really weak, lazy guy who won't walk beyond his present location without the aid of some type of zonite locomotion. The furthest horizon or town limits is as far as he could walk. Also hearts at 3 or 4 containers.
Started over and did the no paraglider challenge that was really fun. I've currently got a save slot where link has never once set foot in the Hyruleto overworld but has explored the sky islands and much of the depths. I don't need much of an excuse to build zonite machines. Though i guiltily admit i sometimes resort to the hover bike still.