So, in the reunited Catholic church, would the Copts alone have Alexandria, and the Antiocheans alone have Antioch? Or would we keep this “historically complex” system of Greek and Latin Patriarchs all over the place?
The overlapping jurisdictions already exist so I think it would be very difficult to merge, particularly considering that there are about 45 churches involved.
Just in North America there are the Latin, and 10 sui iuris eastern churches with jurisdictions and then these:
Eastern:
Antiochian Orthodox Christian Archdiocese of N. America
Bulgarian Eastern Orthodox Church
Jerusalem Patriarchate in North and South America
Orthodox Church in America
Romanian Orthodox Archdiocese in America & Canada
Russian Orthodox Church in the USA
Russian Orthodox Church Outside of Russia
Serbian Orthodox Midwestern American Metropolitante
Serbian Orthodox New Gracanica Metropolitanate
Ecumenical Patriarch:
Albanian Orthodox Diocese of America
Carpatho Russian Orthodox Diocese in the USA
Greek Orthodox Archdiocese of America
Greek Orthodox Metropolis of Toronto (Canada)
Ukrainian Orthodox Church of the USA
Oriental:
Armenian Orthodox Church
Coptic Orthodox Church
Ethiopian Orthodox Church
Malankara Syriac Orthodox Church
Syrian Orthodox Church
Assyrian:
Holy Apostolic Catholic Assyrian Church of the East