The environments, the enemies and some of the armor designs are really nice.
Pretty much everything else.
This game really reminds me why I don't like Souls games. I don't like the controls (they are awkward and wonky), hit detection just doesn't seem really good and the game loves to punish you for stuff that isn't your fault (though some of it is). They just aren't fun to me.
(Lords of the Fallen was obtained for free as part of the Games with Gold promotion.)