I don’t think we are heading down any of those paths. Bishop Spong was pretty far off base even for the Anglicanism of his time. But in order for his ideas to take hold, he had to have the support of other Anglican bishops, or at least the silence of orthodox bishops. Fr. Garrous concludes with this:
“We have some courageous and faithful bishops in the Catholic Church who have influenced my life and ministry, and those of many others as well. This is the time for renewed ardor in the face of theological challenges of, at best, playing fast and loose with Church doctrine and, at worst, of heresy in the Americas and abroad.”
I think his message is that there are forces currently which can result in a theological divide that threatens schism. He calls for renewed ardor to protect orthodox doctrine, and not silence when faced with heterodoxy.