Kind of tough to do if you want to keep pretending your church is apostolic. Otherwise, the liberals should just go over to the Unitarians. So they're fighting claw, tooth and nail for their agenda from within the Church. This is happening in all the mainline Churches of course.
I'm watching this all unfold with apprehension. I belong to a fairly conservative parish (one that opposes gay marriage and ordination of active homosexuals), a healthy parish, the largest in the diocese at about 2000 members. I do not know what will happen if the rest of the Anglican commune tells the north Americans to get lost, nor what I would do.
By the way, the infamous Bishop Spong singled out our parish for a couple of pages of criticism in his latest book. It seems that a book reading group in the parish was reading the the notorious book The Da Vinci Code. The priest in charge of adult education found out and asked them to please consider reading another book; he gave them a list of worthwhile authors. Some of the members of the group were offended by this, and left our parish for the most liberal parish in town. Apparently, Spong found out what was happening (the rector of the aforementioned liberal parish is a Spong protege), and wrote about it.
I met Spong once. What a pompous ass.