It kind of boils down to whether a battle is reaction-based or turned-based (the 'shooter' part) for me. The idea of first-person open world is still lovely, but it doesn't mean that everything has to require adrenaline and concentration and reflexes. For example, Fallout. Then some try to retain a classic feel with a top-down like Baldur's Gate 2 and D:OS and could one day be first-person.