I really am curious as to what the hard mode could be now. Before launch people thought and I agree it couldn't be your simple "Hero Mode" from other games. So much of that is in the game and even with getting a lot of hearts you can still be one shotted by a lot of things or quickly lose your life if you end up surrounded.
Maybe they'll add new types of monsters on the field. More field bosses, "gold" versions of monsters,reduced weapon durability
lol j/k pls don't