Of course, the church's pastoral practice on marriage has changed repeatedly over the centuries and whether or not the teaching is "irreformable" was to be a subject for the synods
So the synods came to no concensus regarding irreformability. And, historically, pastoral practice has changed or varied. It more than suggests that our marital sacred cow is formed more from papier-mâché than hewn from stone. The apparent malleable character of the Church's practice on marriage would seem to suggest an opening for broadening the base of discernment beyond the unmarried, all male, "Princes" of the Church: that is to say, beyond those with no experience attempting to fashion lasting relationships and lasting families in a modern circumstance. Moreover, we live with and nurture our LGBTQ children daily to try to find relationship and family analogues for what their straight age-mates gain validation and support from the Church. The internal progressive-conservative divide seems so irrelevant.