Even if you can avoid fights, you won't always want to. Some of those encounters can be downright deadly.
Although I've been playing the easy mode, it's still quite a journey to make it through some of the dungeons, due to how much damage the enemies deal. Even if you maximize CON and get the best armor, you'll never be invincible like you were in the vanilla game.
Also, what intrigues me is the changes to class spells. I've been wondering how to do that, myself. God knows the vanilla game could use it.