They may not be run by “absolute dictates” from Rome, but I have an honest question: are the synodal elections of patriarchs in the Eastern Catholic Churches approved by the Pope of Rome for final “vesting” (or approval, or “okaying,” or however the greater-educated might put it?) If they are, and must be, then that presents a challenge to pre-schism ecclesiology and eventual reunion. We (the Orthodox) would never accept the action of the Patriarch of Rome accepting or denying the appointing of the bishops when said bishops are not within the See of the Patriarch of Rome. Our bishops are our business! If our local synod approves a patriarch, we do not in any way need the Patriarch of Rome to approve it, because the Holy Spirit approved it beforehand!
Eastern canon law (CCEO) Canons 182, 184, 185 pertain. But this body of law would not apply after full communion is restored, it would be modified or abolished through that process.
182.3. Unless particular law approved by the Roman Pontiff states otherwise, the synod of bishops of the patriarchal Church is to examine the names of the candidates and compile a list of the candidates by secret ballot, which is to be transmitted through the patriarch to the Apostolic See to obtain the assent of the Roman Pontiff.
182.4. The assent of the Roman Pontiff once given for an individual candidate is valid until it has been explicitly revoked, in which case the name of the candidate is to be removed from the list.
184.1. If the one elected is on the list of candidates which the Roman Pontiff has already approved, he is to be informed secretly of the results of the election by the patriarch.
184.2. If the one elected accepts the election, the patriarch is to notify the Apostolic See immediately of the acceptance of the election and the day of proclamation.
185.1. If the one elected is not on the list of candidates, the patriarch is immediately to notify the Apostolic See of the completed election in order to obtain the approval of the Roman Pontiff, secrecy being observed by all who in any way know the results of the election, even toward the one elected, until notification of the assent has reached the patriarch.
185.2. After obtaining the approval of the Roman Pontiff, the patriarch secretly is to inform the one elected of the election and acts according to the norms of can. 184, 2.