“The principal Bishop has said there will be no parish leaving the ECUSA for another Anglican province with its buildings or assets.”
Now we get to the nut of the matter.
“Now we get to the nut of the matter.”
I’m not sure where you are going with this. It is TEC who has left the Anglican Communion, not the orthodox churches. When churches are consecrated under the protocol of the Book of Common Prayer, they are consecrated to TEC, but to the ministry of the gospel. The Preamble to the constitution affirms that TEC will uphold and propagate the historic faith and polity of the Anglican Communion. Congregations of the churches that were established prior to 1977 built churches and established endowments, not for TEC, but for the ministry of the gospel. When a church leaves because TEC has broken trust with the churches it should be disqualified from making any claim to any assets given by people who have relied on the consecration and the affirmation in the Preamble.
The churches who are fighting for the assets are keeping faith with those who gave for the ministry of the gospel. Many of them would give up any rights to buildings since buildings are no the ministry; but they are obliged to fight to keep faith.