Was the Protestant Reformation a Radical Revolution?

If critics of Protestantism are to believed, Reformation Day is a day to lament: Patrick Deneen blames Protestantism for Enlightenment liberalism; Ralph Hancock charges Calvin with rationalism; Catholic intellectuals Hilaire Belloc and Brad Gregory blame the Reformation for destroying Western civilization. So serious and existential are these charges that going "home to Rome" is, for some converts, the ultimate act of resistance against modernity.