I like Mark Harris' take on Lambeth's "trajectory." With the reaction to retired Bishop Spong's explosive 1998 publication of 12 thesis in "Why Christianity must change or die" fundamentalists began a replacement of traditional Anglican theology continuing to the current Windsor "process" and border crossings in the name of orthodoxy. Spong always was a rabid anti-fundamentalist and sensitive to the "theology" that haunted his life inside the religion of the southern U.S. Spong's early, vocal arguments became the whipping boy against which power hungry Wantlands, Duncans, and Schofields struck as if defending all Episcopalians from the monster of heresy. I'll do more on what constitutes heresy later.
Harris sees GAFCON, the current border crossings of Venebles and some African bishops and the devolution of American provincial pretenders like AMIA, AAC, CANA etc. as continuing the trajectory now with Lambeth's stumbling to help it along.