“Don’t need a metaphor for you to know I’m miserable,” sings Lynn Gunn on “What’s Wrong.” After PVRIS’ conceptual debut, White Noise, singer/guitarist Gunn confronts heartache and anxiety with new candor and vulnerability. It fuels a darker, broader sound without sacrificing the trio’s gift for arena-filling choruses. Their compelling fusion of rock and electronic suggests Florence + The Machine on the soaring, percussive “What’s Wrong” and “Heaven,” while they pull off the difficult trick of making rock music that’s dramatic and grand but not overripe on “No Mercy.”