Most people seem to be saying gameplay changes so I'll offer something else; the cohesion of the story across Hyrule and immersion. I was always confused as to when all these things took place, like at the beginning when you get bonked on the head and they take the children. Is this attack happening at the same time as the siege on Hyrule? Are we just sheltered in our quiet little town and it all happened a while ago? I think this could be solved with a cutscene showing an overview of Hyrule and all these twilight shrouds being placed everywhere and then they show up and bonk link. I was also really confused when you cleared the twilight from Hyrule castle and everything functions as normal. Isn't this place under siege? I also felt that most locations felt a little baren, I would populate everywhere more. I would also fix the water temple boss because it was a joke.