The problem with the Episcopal Church of America is that they have lost their identity. Anglicanism is no longer taught to their children, but rather some pusedo-pan-ecumenical-everybody is ok-Christianity. Add to that the homosexuality thing and you have a disaster. I left the Episcopal Church in 1998 and have never looked back.
I left in 1989. What I find is that the current problem is one that is just how the split that accompanied the original departure from Rome developed. From the start, there have been Anglicans of an individualistic bent (originally, Arminians and Presbyterians) and those of a Catholic leaning. The Kings at various times leaned to one or the other, which only increased the tenacity of each side (and the ferocity that accompanied switch-overs).
For a while there, back in the late 19th Century, there was a great deal of hope that Anglo-Catholicism had sufficiently captured the American Church that reunion with Rome or at least autochthonous status could be established. The Evangelicals resurged at the beginning of the 20th Century and have never looked back. It took 50 years to really destroy the Catholicity of core Anglican worship, but they were intent on their goal. It then took another 20 years for the damage to percolate into actual parishional practice, at which point most really hard-core A-C's departed. When they left, they took with them the voting ballast necessary to really sustain any kind of orthodox position within TEC. The result is as you see it.
Kind of thumbnail, and I can fill in plenty of details, but I think to say that this is a recent problem does not do justice to the magnitude of the apostasy that is involved, how long it took apostates to destroy a great Church and exactly how tenacious Satan is when he gets his teeth into a vital part of the Body of Christ.