With the same thing happening with the United Methodists, United Church of Christ, Evangelical Lutheran Church in America, and Presbyterian Church in America, theological liberals obviously are true-believers of whatever it is they believe. They're obviously driving (or have driven, in the case of the UCC) Christian believers out of their organizations and congregations.
Schori & Co. may end up with a lot of church properties, and the believers who left may have to resort to church-in-a-box using school cafeterias, storefronts, and empty business buildings. But those church buildings will be nearly empty, and a financial burden on the Episcopal denomination. OTOH, the congregations and believers who once used those buildings will be alive in Christ and in fellowship with each other.
Buildings are tools; a church is people.