Burning in the Skies and Iridescent are both rock ballads. ROCK ballads.
Wretches and Kings is rap rock, pretty much indisputable.
Blackout is most easily labelled as industrial rock, and the final section is definitely rock.
Just 'cause something 'aint heavy, it can still be a rock song. New Muse isn't heavy, but (almost) all of it is still rock.