I really hope they don't add enemy health regen again for TotK Master Mode. It made so many fights a slog to get through rather than more difficult.
I think your idea of different ways to spend light blessings is really cool! I think I'd also like it if enemies used more weird fusion combos. Like I don't really worry about enemy archers much in combat since I'm moving around so much, but if they were using keese eyeballs or dazzle fruit on me sometimes, I would have to worry more about positioning in combat or taking them out.
I met Craig Ferguson a few years ago, I was just a stand-in contestant for a game show pilot he was filming. He was super nice, took the time to say hello and have a quick chat before getting down to business.
It was really cool to watch him, he was so calm and cool until the camera started rolling and then he was just 'on'.