If you add more rules and want one to read "Core Rules" it should be the "Normal" setting. Unless you want a difficulty which basically says "We assumed you all are too bad for the real rules". I mean, the main difference is saving, to be honest.
Even the rest-abuse is possible in real P&P, you just need to spend most of your day reading a book or something like that.
I honestly dislike the Story Mode difficulty as well. It is immortality + max strength, that is not a difficulty setting that is an inbuild godmode.
