That is an… unusual comparison. Are you sure you downloaded the right demo? This is not a DIablo-like in any sense. It’s an open-world free roaming action rpg, more closely related to an Elder Scrolls game or a Souls game for people that don’t hate themselves.
None of which means it’s for you, of course. Personally I enjoyed the world and found the combat to be some of the most fluid, best-feeling “dodge and strike” I’d ever played.