Apparently, even Congar either evolved or was misinterpreted.....

The book you are speaking of was written in 1968.  Yet "In 1979 Father Congar deplored the “rather simplistic practice” of interpreting the council as if it had been “an absolute new beginning, the point of departure for a completely new Church.” Against claims of a revolutionary break with the past, the eminent theologian declared he was “anxious to stress the continuity of tradition.” Vatican II, he said, was “one moment and neither the first nor the last moment in that tradition.” http://www.crisismagazine.com/2006/vatican-ii-and-the-culture-of-dissent-2