There’s an extensive article over at Called to Communion: http://www.calledtocommunion.com/2014/06/the-bishops-of-history-and-the-catholic-faith-a-reply-to-brandon-addison/  which can be a useful basis for a discussion of ecclesiology.   Of course, ‘discussion’ of ecclesiology is generally too abstract to be useful unless the folks discussing are all active participants in more then one ecclesial body, which is rare.