There are just enough Episcopalians left to want it both ways - congregational and hierarchical.
Creedal Christian finds and shares a comment typical of many people in the pews - "If it isn't about my home congregation, it really doesn't matter." Many Episcopalians say, "Who cares if we split from the Anglican Communion or the rest of Christianity for that matter? If it isn't my own home church, what's the diff?" That's a congregational point of view shared by many Protestants around the world.
What makes it bizarre in the case of Episcopalians is that the denominational leadership have been using the term "hierarchical" more and more to describe themselves. In this view, the church is not congregational, but a top-down organization. The "me and my local church" pew sitters are allowing their offerings to go to lawsuits, international travel junkets, political lobbying, formation of a new, multinational "Episcopal Communion" and other means by which the national church bureaucracy takes more and more control of church identity, resources and operation.
David C. Trimble shares a sad story of one diocese where the congregations are little more than ATMs for a Bishop who's always away enhancing his status in the national bureaucracy.
So "congregational" = "Left alone to die in peace" and "hierarchical" = "OK, just remember us in your will."