Apple is considering a dramatic overhaul of its iTunes music store as iTunes Radio has failed to stop declining music downloads, reports Billboard. As reported earlier this year, the company may create an on-demand music streaming service similar to Spotify in order to boost sales as well as an Android iTunes app. "iTunes Radio hasn’t solved the problem of refreshing the iTunes store," said a senior label executive. "While listeners are clicking the buy buttons, the traffic it is driving is in the low single digits of listeners."Only one to two percent of iTunes Radio lis