It's not necessarily lead singers that "have left, or abandoned" their bands, it can be growing in different directions. Or it can be a band no longer swimming in the same direction. It can be hard to admit it when a band has run its course.
"I've always been a roots enthusiast really, it's always been based around the blues and folk music, so there are large areas of influence there. I didn't just want to just make a straight blues album."
No one would credit Top 40 for being innovative, but there's a difference between "everything on the radio sounds the same" and "beyotch stole my track." Ryan Tedder's rampant recycling sends a bad message about being successful in the music industry.
Welcome to Snoopworld, where Chevys still are bouncin', would-be gangstas still kind of prowl the streets (albeit it's a new generation), explicit-isms flow like 40 oz. beer, and tempos best not harsh anyone's mellow.