I couldn't read the entire article. I've known of Episcopalians who have been refused termination of their membership. The church would only transfer their membership to another curch of the same denomination. Our clients (I work in a law office) only wanted their names deleted from the membership roll of the Episopalian church, not transferred to another church. The Episcopalian denomiation abandoned them (our clients) but our clients were not allowed to abandon the denomination.
Forget the membership rolls, just start attending the new church. They cannot FORCE you to stay or to donate money to them.