Jesus was clear about the universal application of His teachings on marriage - as in clear from His response to His disciple's claim it was unreasonable. He made no qualifications but reinforced His points. How does "greater diversity and pluralism" apply to Catholics, who presumably accept the teachings of the Church, and want license and Church approval to set this teaching aside because of "lived experience"? 

Indeed, God's law is made for our happiness and not rote imposition or blind compliance, especially if such man made "rules" were unreasonable.  But, how is plucking a few stalks of grain on the Sabbath or performing works of mercy, comparable to willful and ongoing adultery in direct contradiction to Our Lord's explicit command?