Goo Goo Dolls lead singer John Rzeznik has often alluded to a last album before a much-needed retirement in Italy where he would spend his days as a family man and chef, but after listening to “Let Love In,” the band’s 10th official album and eighth studio release, fans, collectively known as “Goobers,” can only hope that there is much more in store for this underrated rock ‘n’ roller than mouth-watering cuisine and dirty diapers.